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Revert "Remove TSD zfs_fsyncer_key"

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This reverts commit 31f2b5abdf back
to the original code until the fsync(2) performance regression
can be addressed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2012-12-20 09:55:47 -08:00
parent 23e3c743f6
commit d5446cfc52
4 changed files with 16 additions and 1 deletions
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module/zfs/zfs_log.c
+7 -1
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@@ -457,6 +457,7 @@ zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
{
itx_wr_state_t write_state;
boolean_t slogging;
uintptr_t fsync_cnt;
ssize_t immediate_write_sz;
if (zil_replaying(zilog, tx) || zp->z_unlinked)
@@ -474,6 +475,10 @@ zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
else
write_state = WR_NEED_COPY;
if ((fsync_cnt = (uintptr_t)tsd_get(zfs_fsyncer_key)) != 0) {
(void) tsd_set(zfs_fsyncer_key, (void *)(fsync_cnt - 1));
}
while (resid) {
itx_t *itx;
lr_write_t *lr;
@@ -509,7 +514,8 @@ zfs_log_write(zilog_t *zilog, dmu_tx_t *tx, int txtype,
itx->itx_private = ZTOZSB(zp);
if (!(ioflag & (FSYNC | FDSYNC)) && (zp->z_sync_cnt == 0))
if (!(ioflag & (FSYNC | FDSYNC)) && (zp->z_sync_cnt == 0) &&
(fsync_cnt == 0))
itx->itx_sync = B_FALSE;
zil_itx_assign(zilog, itx, tx);