Merge commit 'refs/top-bases/linux-symbol-collisions' into linux-symbol-collisions
This commit is contained in:
Brian Behlendorf
commit
fe87fabe55
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@ -54,9 +54,6 @@
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* module/zcommon/zfs_prop.c: Export new quota related symbols.
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* lib/libzfs/libzfs_util.c: Increase buffer size for nvlist which
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is needed for large configurations.
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* lib/libzpool/kernel.c: Reimplement user kthreads based on pthread
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thread specific data. This resolves previous scalabily concerns about
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the cost of calling curthread which previously required a list walk.
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* Bug fixes:
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* lib/libspl/include/sys/zfs_debug.h: Removed duplicate file.
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@ -141,6 +141,7 @@ typedef struct ztest_args {
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objset_t *za_os;
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zilog_t *za_zilog;
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kthread_t *za_thread;
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kt_did_t za_threadid;
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uint64_t za_instance;
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uint64_t za_random;
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uint64_t za_diroff;
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@ -156,7 +157,6 @@ typedef struct ztest_args {
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ztest_block_tag_t za_wbt;
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dmu_object_info_t za_doi;
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dmu_buf_t *za_dbuf;
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boolean_t za_exited;
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} ztest_args_t;
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typedef void ztest_func_t(ztest_args_t *);
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@ -253,8 +253,6 @@ typedef struct ztest_shared {
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kmutex_t zs_sync_lock[ZTEST_SYNC_LOCKS];
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uint64_t zs_seq[ZTEST_SYNC_LOCKS];
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ztest_cb_list_t zs_cb_list;
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kmutex_t zs_thr_lock;
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kcondvar_t zs_thr_cv;
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} ztest_shared_t;
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static char ztest_dev_template[] = "%s/%s.%llua";
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@ -266,7 +264,6 @@ static int ztest_dump_core = 1;
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static uint64_t metaslab_sz;
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static boolean_t ztest_exiting;
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static boolean_t resume_thr_exited;
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extern uint64_t metaslab_gang_bang;
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extern uint64_t metaslab_df_alloc_threshold;
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@ -3822,8 +3819,6 @@ ztest_resume_thread(void *arg)
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ztest_resume(spa);
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}
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resume_thr_exited = B_TRUE;
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thread_exit();
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return (NULL);
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}
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@ -3889,13 +3884,6 @@ ztest_thread(void *arg)
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break;
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}
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mutex_enter(&zs->zs_thr_lock);
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za->za_exited = B_TRUE;
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mutex_exit(&zs->zs_thr_lock);
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/* Announce that the thread has finished */
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cv_broadcast(&zs->zs_thr_cv);
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thread_exit();
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return (NULL);
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}
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@ -3912,14 +3900,13 @@ ztest_run(char *pool)
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spa_t *spa;
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char name[100];
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kthread_t *resume_thread;
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kt_did_t resume_id;
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ztest_exiting = B_FALSE;
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mutex_init(&zs->zs_vdev_lock, NULL, MUTEX_DEFAULT, NULL);
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rw_init(&zs->zs_name_lock, NULL, RW_DEFAULT, NULL);
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mutex_init(&zs->zs_cb_list.zcl_callbacks_lock,NULL,MUTEX_DEFAULT,NULL);
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mutex_init(&zs->zs_thr_lock, NULL, MUTEX_DEFAULT, NULL);
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cv_init(&zs->zs_thr_cv, NULL, CV_DEFAULT, NULL);
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list_create(&zs->zs_cb_list.zcl_callbacks, sizeof (ztest_cb_data_t),
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offsetof(ztest_cb_data_t, zcd_node));
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@ -3992,9 +3979,9 @@ ztest_run(char *pool)
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/*
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* Create a thread to periodically resume suspended I/O.
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*/
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resume_thr_exited = B_FALSE;
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VERIFY3P((resume_thread = thread_create(NULL, 0, ztest_resume_thread,
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spa, TS_RUN, NULL, 0, 0)), !=, NULL);
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spa, THR_BOUND, NULL, 0, 0)), !=, NULL);
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resume_id = resume_thread->t_tid;
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/*
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* Verify that we can safely inquire about about any object,
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@ -4070,18 +4057,13 @@ ztest_run(char *pool)
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za[d].za_zilog = zil_open(za[d].za_os, NULL);
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}
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za[t].za_exited = B_FALSE;
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VERIFY3P((za[t].za_thread = thread_create(NULL, 0, ztest_thread,
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&za[t], TS_RUN, NULL, 0, 0)), !=, NULL);
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&za[t], THR_BOUND, NULL, 0, 0)), !=, NULL);
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za[t].za_threadid = za[t].za_thread->t_tid;
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}
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while (--t >= 0) {
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mutex_enter(&zs->zs_thr_lock);
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while (!za[t].za_exited)
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cv_wait(&zs->zs_thr_cv, &zs->zs_thr_lock);
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mutex_exit(&zs->zs_thr_lock);
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VERIFY(thread_join(za[t].za_threadid, NULL, NULL) == 0);
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if (t < zopt_datasets) {
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zil_close(za[t].za_zilog);
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dmu_objset_close(za[t].za_os);
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@ -4120,11 +4102,7 @@ ztest_run(char *pool)
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/* Kill the resume thread */
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ztest_exiting = B_TRUE;
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/* Wait for the resume thread to exit */
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while (!resume_thr_exited)
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(void) poll(NULL, 0, 200);
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VERIFY(thread_join(resume_id, NULL, NULL) == 0);
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ztest_resume(spa);
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/*
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@ -4140,8 +4118,6 @@ ztest_run(char *pool)
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list_destroy(&zs->zs_cb_list.zcl_callbacks);
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cv_destroy(&zs->zs_thr_cv);
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mutex_destroy(&zs->zs_thr_lock);
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mutex_destroy(&zs->zs_cb_list.zcl_callbacks_lock);
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rw_destroy(&zs->zs_name_lock);
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mutex_destroy(&zs->zs_vdev_lock);
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@ -198,34 +198,34 @@ _NOTE(CONSTCOND) } while (0)
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/*
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* Threads
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*/
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#define THR_BOUND 0x00000001
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#define TS_RUN 0x00000002
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#define STACK_SIZE 8192 /* x86/x64 */
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typedef void (*thread_func_t)(void);
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typedef void (*thread_func_arg_t)(void *);
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typedef void (*thread_func_t)(void *);
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typedef pthread_t kt_did_t;
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typedef struct kthread {
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list_node_t t_node;
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kt_did_t t_tid;
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thread_func_t t_func;
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void * t_arg;
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pthread_attr_t t_attr;
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} kthread_t;
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/* XXX tsd_create()/tsd_destroy() missing */
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#define tsd_get(key) pthread_getspecific(key)
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#define tsd_set(key, val) pthread_setspecific(key, val)
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#define curthread zk_thread_current()
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#define thread_exit zk_thread_exit
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#define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
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zk_thread_create(stk, stksize, (thread_func_t) func, arg, len, \
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NULL, state, pri)
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zk_thread_create(stk, stksize, (thread_func_t)func, arg, \
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len, NULL, state, pri)
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#define thread_join(tid, dtid, status) \
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zk_thread_join(tid, dtid, status)
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extern kthread_t *zk_thread_current(void);
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extern void zk_thread_exit(void);
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extern kthread_t *zk_thread_create(caddr_t stk, size_t stksize,
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thread_func_t func, void *arg, size_t len,
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void *pp, int state, pri_t pri);
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extern int zk_thread_join(kt_did_t tid, kthread_t *dtid, void **status);
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#define issig(why) (FALSE)
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#define ISSIG(thr, why) (FALSE)
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@ -357,7 +357,7 @@ extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
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extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
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extern void taskq_destroy(taskq_t *);
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extern void taskq_wait(taskq_t *);
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extern int taskq_member(taskq_t *, kthread_t *);
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extern int taskq_member(taskq_t *, void *);
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extern void system_taskq_init(void);
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extern void system_taskq_fini(void);
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@ -57,82 +57,112 @@ struct utsname utsname = {
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* =========================================================================
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*/
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/* NOTE: Tracking each tid on a list and using it for curthread lookups
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* is slow at best but it provides an easy way to provide a kthread
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* style API on top of pthreads. For now we just want ztest to work
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* to validate correctness. Performance is not much of an issue
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* since that is what the in-kernel version is for. That said
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* reworking this to track the kthread_t structure as thread
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* specific data would be probably the best way to speed this up.
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*/
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pthread_cond_t kthread_cond = PTHREAD_COND_INITIALIZER;
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pthread_mutex_t kthread_lock = PTHREAD_MUTEX_INITIALIZER;
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pthread_key_t kthread_key;
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int kthread_nr = 0;
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list_t kthread_list;
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static int
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thread_count(void)
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{
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kthread_t *kt;
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int count = 0;
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for (kt = list_head(&kthread_list); kt != NULL;
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kt = list_next(&kthread_list, kt))
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count++;
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return count;
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}
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static void
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thread_init(void)
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{
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kthread_t *kt;
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VERIFY3S(pthread_key_create(&kthread_key, NULL), ==, 0);
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/* Initialize list for tracking kthreads */
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list_create(&kthread_list, sizeof (kthread_t),
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offsetof(kthread_t, t_node));
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/* Create entry for primary kthread */
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kt = umem_zalloc(sizeof(kthread_t), UMEM_NOFAIL);
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kt->t_tid = pthread_self();
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kt->t_func = NULL;
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VERIFY3S(pthread_setspecific(kthread_key, kt), ==, 0);
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/* Only the main thread should be running at the moment */
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ASSERT3S(kthread_nr, ==, 0);
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kthread_nr = 1;
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list_link_init(&kt->t_node);
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VERIFY3U(kt->t_tid = pthread_self(), !=, 0);
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VERIFY3S(pthread_attr_init(&kt->t_attr), ==, 0);
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VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0);
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list_insert_head(&kthread_list, kt);
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VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0);
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}
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static void
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thread_fini(void)
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{
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kthread_t *kt = curthread;
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ASSERT(pthread_equal(kt->t_tid, pthread_self()));
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ASSERT3P(kt->t_func, ==, NULL);
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umem_free(kt, sizeof(kthread_t));
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kthread_t *kt;
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struct timespec ts = { 0 };
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int count;
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/* Wait for all threads to exit via thread_exit() */
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VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0);
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while ((count = thread_count()) > 1) {
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clock_gettime(CLOCK_REALTIME, &ts);
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ts.tv_sec += 1;
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pthread_cond_timedwait(&kthread_cond, &kthread_lock, &ts);
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}
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kthread_nr--; /* Main thread is exiting */
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while (kthread_nr > 0)
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VERIFY3S(pthread_cond_wait(&kthread_cond, &kthread_lock), ==,
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0);
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ASSERT3S(kthread_nr, ==, 0);
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ASSERT3S(thread_count(), ==, 1);
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kt = list_head(&kthread_list);
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list_remove(&kthread_list, kt);
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VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0);
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VERIFY3S(pthread_key_delete(kthread_key), ==, 0);
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VERIFY(pthread_attr_destroy(&kt->t_attr) == 0);
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umem_free(kt, sizeof(kthread_t));
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/* Cleanup list for tracking kthreads */
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list_destroy(&kthread_list);
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}
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kthread_t *
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zk_thread_current(void)
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{
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kthread_t *kt = pthread_getspecific(kthread_key);
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ASSERT3P(kt, !=, NULL);
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return kt;
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}
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void *
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zk_thread_helper(void *arg)
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{
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kthread_t *kt = (kthread_t *) arg;
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VERIFY3S(pthread_setspecific(kthread_key, kt), ==, 0);
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kt_did_t tid = pthread_self();
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kthread_t *kt;
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int count = 1;
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/*
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* Because a newly created thread may call zk_thread_current()
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* before the thread parent has had time to add the thread's tid
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* to our lookup list. We will loop as long as there are tid
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* which have not yet been set which must be one of ours.
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* Yes it's a hack, at some point we can just use native pthreads.
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*/
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while (count > 0) {
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count = 0;
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VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0);
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kthread_nr++;
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for (kt = list_head(&kthread_list); kt != NULL;
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kt = list_next(&kthread_list, kt)) {
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if (kt->t_tid == tid) {
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VERIFY3S(pthread_mutex_unlock(
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&kthread_lock), ==, 0);
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return kt;
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}
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|
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if (kt->t_tid == (kt_did_t)-1)
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count++;
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}
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VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0);
|
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}
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|
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kt->t_tid = pthread_self();
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((thread_func_arg_t) kt->t_func)(kt->t_arg);
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|
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/* Unreachable, thread must exit with thread_exit() */
|
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abort();
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|
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/* Unreachable */
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ASSERT(0);
|
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return NULL;
|
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}
|
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|
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|
|
@ -141,57 +171,41 @@ zk_thread_create(caddr_t stk, size_t stksize, thread_func_t func, void *arg,
|
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size_t len, void *pp, int state, pri_t pri)
|
||||
{
|
||||
kthread_t *kt;
|
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pthread_t tid;
|
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pthread_attr_t attr;
|
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size_t stack;
|
||||
|
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/*
|
||||
* Due to a race when getting/setting the thread ID, currently only
|
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* detached threads are supported.
|
||||
*/
|
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ASSERT3S(state & ~TS_RUN, ==, 0);
|
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|
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kt = umem_zalloc(sizeof(kthread_t), UMEM_NOFAIL);
|
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kt->t_func = func;
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kt->t_arg = arg;
|
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kt->t_tid = (kt_did_t)-1;
|
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list_link_init(&kt->t_node);
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VERIFY(pthread_attr_init(&kt->t_attr) == 0);
|
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|
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/*
|
||||
* The Solaris kernel stack size in x86/x64 is 8K, so we reduce the
|
||||
* default stack size in userspace, for sanity checking.
|
||||
*
|
||||
* PTHREAD_STACK_MIN is the stack required for a NULL procedure in
|
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* userspace.
|
||||
*
|
||||
* XXX: Stack size for other architectures is not being taken into
|
||||
* account.
|
||||
*/
|
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stack = PTHREAD_STACK_MIN + MAX(stksize, STACK_SIZE);
|
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VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0);
|
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list_insert_head(&kthread_list, kt);
|
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VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0);
|
||||
|
||||
VERIFY3S(pthread_attr_init(&attr), ==, 0);
|
||||
VERIFY3S(pthread_attr_setstacksize(&attr, stack), ==, 0);
|
||||
VERIFY3S(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED),
|
||||
==, 0);
|
||||
|
||||
VERIFY3S(pthread_create(&tid, &attr, &zk_thread_helper, kt), ==, 0);
|
||||
|
||||
VERIFY3S(pthread_attr_destroy(&attr), ==, 0);
|
||||
VERIFY3U(pthread_create(&kt->t_tid, &kt->t_attr,
|
||||
(void *(*)(void *))func, arg), ==, 0);
|
||||
|
||||
return kt;
|
||||
}
|
||||
|
||||
int
|
||||
zk_thread_join(kt_did_t tid, kthread_t *dtid, void **status)
|
||||
{
|
||||
return pthread_join(tid, status);
|
||||
}
|
||||
|
||||
void
|
||||
zk_thread_exit(void)
|
||||
{
|
||||
kthread_t *kt = curthread;
|
||||
kthread_t *kt;
|
||||
|
||||
ASSERT(pthread_equal(kt->t_tid, pthread_self()));
|
||||
VERIFY3P(kt = curthread, !=, NULL);
|
||||
VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0);
|
||||
list_remove(&kthread_list, kt);
|
||||
VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0);
|
||||
|
||||
VERIFY(pthread_attr_destroy(&kt->t_attr) == 0);
|
||||
umem_free(kt, sizeof(kthread_t));
|
||||
|
||||
pthread_mutex_lock(&kthread_lock);
|
||||
kthread_nr--;
|
||||
pthread_mutex_unlock(&kthread_lock);
|
||||
|
||||
pthread_cond_broadcast(&kthread_cond);
|
||||
pthread_exit(NULL);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -43,6 +43,7 @@ struct taskq {
|
|||
kcondvar_t tq_dispatch_cv;
|
||||
kcondvar_t tq_wait_cv;
|
||||
kthread_t **tq_threadlist;
|
||||
kt_did_t *tq_idlist;
|
||||
int tq_flags;
|
||||
int tq_active;
|
||||
int tq_nthreads;
|
||||
|
|
@ -134,7 +135,7 @@ taskq_wait(taskq_t *tq)
|
|||
mutex_exit(&tq->tq_lock);
|
||||
}
|
||||
|
||||
static void
|
||||
static void *
|
||||
taskq_thread(void *arg)
|
||||
{
|
||||
taskq_t *tq = arg;
|
||||
|
|
@ -164,6 +165,7 @@ taskq_thread(void *arg)
|
|||
cv_broadcast(&tq->tq_wait_cv);
|
||||
mutex_exit(&tq->tq_lock);
|
||||
thread_exit();
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/*ARGSUSED*/
|
||||
|
|
@ -198,8 +200,10 @@ taskq_create(const char *name, int nthreads, pri_t pri,
|
|||
tq->tq_maxalloc = maxalloc;
|
||||
tq->tq_task.task_next = &tq->tq_task;
|
||||
tq->tq_task.task_prev = &tq->tq_task;
|
||||
tq->tq_threadlist = kmem_alloc(tq->tq_nthreads * sizeof(kthread_t *),
|
||||
KM_SLEEP);
|
||||
VERIFY3P((tq->tq_threadlist = kmem_alloc(tq->tq_nthreads *
|
||||
sizeof(kthread_t *), KM_SLEEP)), !=, NULL);
|
||||
VERIFY3P((tq->tq_idlist = kmem_alloc(tq->tq_nthreads *
|
||||
sizeof(kt_did_t), KM_SLEEP)), !=, NULL);
|
||||
|
||||
if (flags & TASKQ_PREPOPULATE) {
|
||||
mutex_enter(&tq->tq_lock);
|
||||
|
|
@ -210,7 +214,8 @@ taskq_create(const char *name, int nthreads, pri_t pri,
|
|||
|
||||
for (t = 0; t < tq->tq_nthreads; t++) {
|
||||
VERIFY((tq->tq_threadlist[t] = thread_create(NULL, 0,
|
||||
taskq_thread, tq, TS_RUN, NULL, 0, 0)) != NULL);
|
||||
taskq_thread, tq, THR_BOUND, NULL, 0, 0)) != NULL);
|
||||
tq->tq_idlist[t] = tq->tq_threadlist[t]->t_tid;
|
||||
}
|
||||
|
||||
return (tq);
|
||||
|
|
@ -219,6 +224,7 @@ taskq_create(const char *name, int nthreads, pri_t pri,
|
|||
void
|
||||
taskq_destroy(taskq_t *tq)
|
||||
{
|
||||
int t;
|
||||
int nthreads = tq->tq_nthreads;
|
||||
|
||||
taskq_wait(tq);
|
||||
|
|
@ -239,7 +245,11 @@ taskq_destroy(taskq_t *tq)
|
|||
|
||||
mutex_exit(&tq->tq_lock);
|
||||
|
||||
for (t = 0; t < nthreads; t++)
|
||||
VERIFY3S(thread_join(tq->tq_idlist[t], NULL, NULL), ==, 0);
|
||||
|
||||
kmem_free(tq->tq_threadlist, nthreads * sizeof(kthread_t *));
|
||||
kmem_free(tq->tq_idlist, nthreads * sizeof(kt_did_t));
|
||||
|
||||
rw_destroy(&tq->tq_threadlock);
|
||||
mutex_destroy(&tq->tq_lock);
|
||||
|
|
@ -250,7 +260,7 @@ taskq_destroy(taskq_t *tq)
|
|||
}
|
||||
|
||||
int
|
||||
taskq_member(taskq_t *tq, kthread_t *t)
|
||||
taskq_member(taskq_t *tq, void *t)
|
||||
{
|
||||
int i;
|
||||
|
||||
|
|
@ -258,7 +268,7 @@ taskq_member(taskq_t *tq, kthread_t *t)
|
|||
return (1);
|
||||
|
||||
for (i = 0; i < tq->tq_nthreads; i++)
|
||||
if (tq->tq_threadlist[i] == t)
|
||||
if (tq->tq_threadlist[i] == (kthread_t *)t)
|
||||
return (1);
|
||||
|
||||
return (0);
|
||||
|
|
|
|||
|
|
@ -446,6 +446,8 @@ txg_sync_thread(dsl_pool_t *dp)
|
|||
rw_exit(&tx->tx_suspend);
|
||||
cv_broadcast(&tx->tx_sync_done_cv);
|
||||
}
|
||||
|
||||
thread_exit();
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -490,6 +492,8 @@ txg_quiesce_thread(dsl_pool_t *dp)
|
|||
cv_broadcast(&tx->tx_sync_more_cv);
|
||||
cv_broadcast(&tx->tx_quiesce_done_cv);
|
||||
}
|
||||
|
||||
thread_exit();
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
|||
Loading…
Reference in New Issue