Merge commit 'refs/top-bases/linux-kernel-mem' into linux-kernel-mem

lib/libzpool/include/sys/zfs_context.h

@@ -204,7 +204,11 @@ _NOTE(CONSTCOND) } while (0)
  * Threads
  */
 #define TS_RUN			0x00000002
+#ifdef _linux_
 #define	STACK_SIZE		8192	/* Linux x86 and amd64 */
+#else
+#define	STACK_SIZE		24576	/* Solaris */
+#endif
 
 /* in libzpool, p0 exists only to have its address taken */
 typedef struct proc {

lib/libzpool/kernel.c

@@ -144,14 +144,9 @@ zk_thread_create(caddr_t stk, size_t stksize, thread_func_t func, void *arg,
 	      size_t len, proc_t *pp, int state, pri_t pri)
 {
 	kthread_t *kt;
-	pthread_t tid;
 	pthread_attr_t attr;
 	size_t stack;
 
-	/*
-	 * Due to a race when getting/setting the thread ID, currently only
-	 * detached threads are supported.
-	 */
 	ASSERT3S(state & ~TS_RUN, ==, 0);
 
 	kt = umem_zalloc(sizeof(kthread_t), UMEM_NOFAIL);
@@ -159,23 +154,23 @@ zk_thread_create(caddr_t stk, size_t stksize, thread_func_t func, void *arg,
 	kt->t_arg = arg;
 
 	/*
-	 * The Solaris kernel stack size in x86/x64 is 8K, so we reduce the
+	 * The Solaris kernel stack size is 24k for x86/x86_64.
-	 * default stack size in userspace, for sanity checking.
+	 * The Linux kernel stack size is 8k for x86/x86_64.
 	 *
-	 * PTHREAD_STACK_MIN is the stack required for a NULL procedure in
+	 * We reduce the default stack size in userspace, to ensure
-	 * userspace.
+	 * we observe stack overruns in user space as well as in
-	 *
+	 * kernel space.  PTHREAD_STACK_MIN is the minimum stack
-	 * XXX: Stack size for other architectures is not being taken into
+	 * required for a NULL procedure in user space and is added
-	 * account.
+	 * in to the stack requirements.
 	 */
 	stack = PTHREAD_STACK_MIN + MAX(stksize, STACK_SIZE);
 
 	VERIFY3S(pthread_attr_init(&attr), ==, 0);
 	VERIFY3S(pthread_attr_setstacksize(&attr, stack), ==, 0);
-	VERIFY3S(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED),
+	VERIFY3S(pthread_attr_setguardsize(&attr, PAGESIZE), ==, 0);
-	    ==, 0);
 
-	VERIFY3S(pthread_create(&tid, &attr, &zk_thread_helper, kt), ==, 0);
+	VERIFY3S(pthread_create(&kt->t_tid, &attr, &zk_thread_helper, kt),
+	    ==, 0);
 
 	VERIFY3S(pthread_attr_destroy(&attr), ==, 0);
 

module/zfs/dmu_objset.c

@@ -914,7 +914,7 @@ dmu_objset_snapshot(char *fsname, char *snapname,
 		if (dst->dst_err)
 			dsl_dataset_name(ds, sn->failed);
 		zil_resume(dmu_objset_zil(os));
-		dmu_objset_rele(os, &sn);
+		dmu_objset_rele(os, sn);
 	}
 
 	if (err)

module/zfs/vdev_raidz.c

@@ -1638,8 +1638,11 @@ raidz_checksum_verify(zio_t *zio)
 {
 	zio_bad_cksum_t zbc;
 	raidz_map_t *rm = zio->io_vsd;
+	int ret;
 
-	int ret = zio_checksum_error(zio, &zbc);
+	bzero(&zbc, sizeof (zio_bad_cksum_t));
+
+	ret = zio_checksum_error(zio, &zbc);
 	if (ret != 0 && zbc.zbc_injected != 0)
 		rm->rm_ecksuminjected = 1;
 

module/zfs/zio.c

@@ -1049,10 +1049,7 @@ zio_taskq_dispatch(zio_t *zio, enum zio_taskq_type q, boolean_t cutinline)
 {
 	spa_t *spa = zio->io_spa;
 	zio_type_t t = zio->io_type;
-	int flags;
+	int flags = TQ_NOSLEEP | (cutinline ? TQ_FRONT : 0);
-
-	flags  = (cutinline ? TQ_FRONT : 0);
-	flags |= ((q == ZIO_TASKQ_INTERRUPT) ? TQ_NOSLEEP : TQ_SLEEP);
 
 	/*
 	 * If we're a config writer or a probe, the normal issue and