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Merge branch 'feature-branch' into refs/top-bases/zfs-branch

This commit is contained in:
Brian Behlendorf 2008-12-18 11:34:25 -08:00
parent d431498139 053a2fffcf
commit 9ae2c70438
7 changed files with 3 additions and 192 deletions
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61
module/zfs/dmu_tx.c
View File

@ -48,8 +48,6 @@ dmu_tx_create_dd(dsl_dir_t *dd)
tx->tx_pool = dd->dd_pool;
list_create(&tx->tx_holds, sizeof (dmu_tx_hold_t),
offsetof(dmu_tx_hold_t, txh_node));
list_create(&tx->tx_callbacks, sizeof (dmu_callback_t),
offsetof(dmu_callback_t, dcb_node));
#ifdef ZFS_DEBUG
refcount_create(&tx->tx_space_written);
refcount_create(&tx->tx_space_freed);
@ -1022,9 +1020,6 @@ dmu_tx_commit(dmu_tx_t *tx)
if (tx->tx_tempreserve_cookie)
dsl_dir_tempreserve_clear(tx->tx_tempreserve_cookie, tx);
if (!list_is_empty(&tx->tx_callbacks))
txg_rele_commit_cb(&tx->tx_txgh, &tx->tx_callbacks);
if (tx->tx_anyobj == FALSE)
txg_rele_to_sync(&tx->tx_txgh);
list_destroy(&tx->tx_holds);
@ -1037,8 +1032,6 @@ dmu_tx_commit(dmu_tx_t *tx)
refcount_destroy_many(&tx->tx_space_freed,
refcount_count(&tx->tx_space_freed));
#endif
ASSERT(list_is_empty(&tx->tx_callbacks));
list_destroy(&tx->tx_callbacks);
kmem_free(tx, sizeof (dmu_tx_t));
}
@ -1046,7 +1039,6 @@ void
dmu_tx_abort(dmu_tx_t *tx)
{
dmu_tx_hold_t *txh;
dmu_callback_t *dcb;
ASSERT(tx->tx_txg == 0);
@ -1058,16 +1050,6 @@ dmu_tx_abort(dmu_tx_t *tx)
if (dn != NULL)
dnode_rele(dn, tx);
}
while ((dcb = list_head(&tx->tx_callbacks))) {
list_remove(&tx->tx_callbacks, dcb);
/*
* Call the callback with an error code. The callback will
* call dmu_tx_callback_data_destroy to free the memory.
*/
dcb->dcb_func(dcb->dcb_data, ECANCELED);
}
list_destroy(&tx->tx_holds);
#ifdef ZFS_DEBUG
refcount_destroy_many(&tx->tx_space_written,
@ -1075,7 +1057,6 @@ dmu_tx_abort(dmu_tx_t *tx)
refcount_destroy_many(&tx->tx_space_freed,
refcount_count(&tx->tx_space_freed));
#endif
list_destroy(&tx->tx_callbacks);
kmem_free(tx, sizeof (dmu_tx_t));
}
@ -1085,45 +1066,3 @@ dmu_tx_get_txg(dmu_tx_t *tx)
ASSERT(tx->tx_txg != 0);
return (tx->tx_txg);
}
void *
dmu_tx_callback_data_create(size_t bytes)
{
dmu_callback_t *dcb;
dcb = kmem_alloc(sizeof (dmu_callback_t) + bytes, KM_SLEEP);
dcb->dcb_magic = DMU_CALLBACK_MAGIC;
dcb->dcb_bytes = bytes;
return &dcb->dcb_data;
}
int
dmu_tx_callback_commit_add(dmu_tx_t *tx, dmu_callback_func_t *dcb_func,
void *dcb_data)
{
dmu_callback_t *dcb = container_of(dcb_data, dmu_callback_t, dcb_data);
if (dcb->dcb_magic != DMU_CALLBACK_MAGIC)
return (EINVAL);
dcb->dcb_func = dcb_func;
list_insert_tail(&tx->tx_callbacks, dcb);
return (0);
}
int
dmu_tx_callback_data_destroy(void *dcb_data)
{
dmu_callback_t *dcb = container_of(dcb_data, dmu_callback_t, dcb_data);
if (dcb->dcb_magic != DMU_CALLBACK_MAGIC)
return (EINVAL);
kmem_free(dcb, sizeof (dmu_callback_t) + dcb->dcb_bytes);
return (0);
}

27
module/zfs/include/sys/dmu.h
View File

@ -64,7 +64,6 @@ struct objset_impl;
typedef struct objset objset_t;
typedef struct dmu_tx dmu_tx_t;
typedef struct dsl_dir dsl_dir_t;
typedef void dmu_callback_func_t(void *dcb_data, int error);
typedef enum dmu_object_type {
DMU_OT_NONE,
@ -430,32 +429,6 @@ int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how);
void dmu_tx_wait(dmu_tx_t *tx);
void dmu_tx_commit(dmu_tx_t *tx);
/*
* To add a commit callback, you must first call dmu_tx_callback_data_create().
* This will return a pointer to a memory area of size "bytes" (which can be 0,
* or just the size of a pointer if there is a large or existing external data
* struct to be referenced) that the caller and the callback can use to exchange
* data.
*
* The callback can then be registered by calling dmu_tx_callback_commit_add()
* with the pointer returned by dmu_tx_callback_data_create() passed in the
* dcb_data argument. The transaction must be already created, but it cannot
* be committed or aborted. It can be assigned to a txg or not.
*
* The callback will be called after the transaction has been safely written
* to stable storage and will also be called if the dmu_tx is aborted.
* If there is any error which prevents the transaction from being committed
* to disk, the callback will be called with a value of error != 0.
*
* When the callback data is no longer needed, it must be destroyed by the
* caller's code with dmu_tx_callback_data_destroy(). This is typically done at
* the end of the callback function.
*/
void *dmu_tx_callback_data_create(size_t bytes);
int dmu_tx_callback_commit_add(dmu_tx_t *tx, dmu_callback_func_t *dcb_func,
void *dcb_data);
int dmu_tx_callback_data_destroy(void *dcb_data);
/*
* Free up the data blocks for a defined range of a file. If size is
* zero, the range from offset to end-of-file is freed.

13
module/zfs/include/sys/dmu_impl.h
View File

@ -232,19 +232,6 @@ extern "C" {
struct objset;
struct dmu_pool;
#define DMU_CALLBACK_MAGIC 0xca11bac0ca11bacfull
#define container_of(ptr, type, member) \
((type *)((char *)(ptr) - offsetof(type, member)))
typedef struct dmu_callback {
list_node_t dcb_node; /* linked to tx_callbacks list */
uint64_t dcb_magic; /* magic number to verify header */
dmu_callback_func_t *dcb_func; /* caller function pointer */
size_t dcb_bytes; /* caller private data size */
char dcb_data[0]; /* caller private data */
} dmu_callback_t;
#ifdef __cplusplus
}
#endif

6
module/zfs/include/sys/dmu_tx.h
View File

@ -59,7 +59,6 @@ struct dmu_tx {
txg_handle_t tx_txgh;
void *tx_tempreserve_cookie;
struct dmu_tx_hold *tx_needassign_txh;
list_t tx_callbacks; /* list of dmu_callback_t on this dmu_tx */
uint8_t tx_anyobj;
int tx_err;
#ifdef ZFS_DEBUG
@ -110,11 +109,6 @@ void dmu_tx_abort(dmu_tx_t *tx);
uint64_t dmu_tx_get_txg(dmu_tx_t *tx);
void dmu_tx_wait(dmu_tx_t *tx);
void *dmu_tx_callback_data_create(size_t bytes);
int dmu_tx_callback_commit_add(dmu_tx_t *tx, dmu_callback_func_t *dcb_func,
void *dcb_data);
int dmu_tx_callback_data_destroy(void *dcb_data);
/*
* These routines are defined in dmu_spa.h, and are called by the SPA.
*/

1
module/zfs/include/sys/txg.h
View File

@ -71,7 +71,6 @@ extern void txg_sync_stop(struct dsl_pool *dp);
extern uint64_t txg_hold_open(struct dsl_pool *dp, txg_handle_t *txghp);
extern void txg_rele_to_quiesce(txg_handle_t *txghp);
extern void txg_rele_to_sync(txg_handle_t *txghp);
extern void txg_rele_commit_cb(txg_handle_t *txghp, list_t *tx_callbacks);
extern void txg_suspend(struct dsl_pool *dp);
extern void txg_resume(struct dsl_pool *dp);

1
module/zfs/include/sys/txg_impl.h
View File

@ -37,7 +37,6 @@ struct tx_cpu {
kmutex_t tc_lock;
kcondvar_t tc_cv[TXG_SIZE];
uint64_t tc_count[TXG_SIZE];
list_t tc_callbacks[TXG_SIZE]; /* post-commit callbacks */
char tc_pad[16];
};

86
module/zfs/txg.c
View File

@ -26,7 +26,6 @@
#include <sys/zfs_context.h>
#include <sys/txg_impl.h>
#include <sys/dmu_impl.h>
#include <sys/dmu_tx.h>
#include <sys/dsl_pool.h>
#include <sys/callb.h>
@ -58,9 +57,6 @@ txg_init(dsl_pool_t *dp, uint64_t txg)
for (i = 0; i < TXG_SIZE; i++) {
cv_init(&tx->tx_cpu[c].tc_cv[i], NULL, CV_DEFAULT,
NULL);
list_create(&tx->tx_cpu[c].tc_callbacks[i],
sizeof (dmu_callback_t), offsetof(dmu_callback_t,
dcb_node));
}
}
@ -102,11 +98,8 @@ txg_fini(dsl_pool_t *dp)
int i;
mutex_destroy(&tx->tx_cpu[c].tc_lock);
for (i = 0; i < TXG_SIZE; i++) {
for (i = 0; i < TXG_SIZE; i++)
cv_destroy(&tx->tx_cpu[c].tc_cv[i]);
ASSERT(list_is_empty(&tx->tx_cpu[c].tc_callbacks[i]));
list_destroy(&tx->tx_cpu[c].tc_callbacks[i]);
}
}
kmem_free(tx->tx_cpu, max_ncpus * sizeof (tx_cpu_t));
@ -252,21 +245,6 @@ txg_rele_to_sync(txg_handle_t *th)
th->th_cpu = NULL; /* defensive */
}
void
txg_rele_commit_cb(txg_handle_t *th, list_t *tx_callbacks)
{
dmu_callback_t *dcb;
tx_cpu_t *tc = th->th_cpu;
int g = th->th_txg & TXG_MASK;
mutex_enter(&tc->tc_lock);
while ((dcb = list_head(tx_callbacks))) {
list_remove(tx_callbacks, dcb);
list_insert_tail(&tc->tc_callbacks[g], dcb);
}
mutex_exit(&tc->tc_lock);
}
static void
txg_quiesce(dsl_pool_t *dp, uint64_t txg)
{
@ -307,15 +285,14 @@ txg_sync_thread(dsl_pool_t *dp)
{
tx_state_t *tx = &dp->dp_tx;
callb_cpr_t cpr;
uint64_t timeout, start, delta, timer;
int c, target;
uint64_t start, delta;
txg_thread_enter(tx, &cpr);
start = delta = 0;
for (;;) {
uint64_t timer, timeout = zfs_txg_timeout * hz;
uint64_t txg, written;
uint64_t txg;
/*
* We sync when we're scrubbing, there's someone waiting
@ -370,63 +347,6 @@ txg_sync_thread(dsl_pool_t *dp)
spa_sync(dp->dp_spa, txg);
delta = lbolt - start;
/*
* Call all the callbacks for this txg. The callbacks must
* call dmu_tx_callback_data_destroy to free memory.
*/
for (c = 0; c < max_ncpus; c++) {
dmu_callback_t *dcb;
tx_cpu_t *tc = &tx->tx_cpu[c];
int g = txg & TXG_MASK;
/* No need to lock tx_cpu_t */
while ((dcb = list_head(&tc->tc_callbacks[g]))) {
list_remove(&tc->tc_callbacks[g], dcb);
dcb->dcb_func(dcb->dcb_data, 0);
}
}
written = dp->dp_space_towrite[txg & TXG_MASK];
dp->dp_space_towrite[txg & TXG_MASK] = 0;
ASSERT(dp->dp_tempreserved[txg & TXG_MASK] == 0);
/*
* If the write limit max has not been explicitly set, set it
* to a fraction of available phisical memory (default 1/8th).
* Note that we must inflate the limit because the spa
* inflates write sizes to account for data replication.
* Check this each sync phase to catch changing memory size.
*/
if (zfs_write_limit_inflated == 0 ||
(zfs_write_limit_shift && zfs_write_limit_max !=
physmem * PAGESIZE >> zfs_write_limit_shift)) {
zfs_write_limit_max =
physmem * PAGESIZE >> zfs_write_limit_shift;
zfs_write_limit_inflated =
spa_get_asize(dp->dp_spa, zfs_write_limit_max);
if (zfs_write_limit_min > zfs_write_limit_inflated)
zfs_write_limit_inflated = zfs_write_limit_min;
}
/*
* Attempt to keep the sync time consistant by adjusting the
* amount of write traffic allowed into each transaction group.
*/
target = zfs_txg_synctime * hz;
if (delta > target) {
uint64_t old = MIN(dp->dp_write_limit, written);
dp->dp_write_limit = MAX(zfs_write_limit_min,
old * target / delta);
} else if (written >= dp->dp_write_limit &&
delta >> 3 < target >> 3) {
uint64_t rescale =
MIN((100 * target) / delta, 200);
dp->dp_write_limit = MIN(zfs_write_limit_inflated,
written * rescale / 100);
}
mutex_enter(&tx->tx_sync_lock);
rw_enter(&tx->tx_suspend, RW_WRITER);
tx->tx_synced_txg = txg;