diff options
| author | Krishnan Parthasarathi <kparthas@redhat.com> | 2013-05-11 14:29:29 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2013-05-21 06:03:14 -0700 |
| commit | f8e19c6b6f21142aadabd2f30dc3b960a6ec1fa2 (patch) | |
| tree | 76f6fc68048ccce6c95b3758b5461992accf54cc /libglusterfs/src/syncop.c | |
| parent | 8abe8f794913daa81d9f1dc0ddab26c9c414abf8 (diff) | |
syncop: Update synctask state appropriately
Backport of http://review.gluster.org/4985
* Earlier, SYNCOP macro, the only consumer of synctask_yield, would set
the task->state to SYNCTASK_SUSPEND. Today, we have glusterd having its
own wrapper macros which don't set task's state. There is also the
syncbarrier and synclock framework, which also participate in a
synctask's scheduling (and need to keep a task's state up to date). It
only makes more sense to leave a synctask's state to the synctask
library, since its an internal affair.
* Need to 'yawn' before 'yield' to avoid re-running tasks to set
task->woken appropriately.
Change-Id: Ic7a59e6ebcc46f03e53223ca237668d45a3cba40
BUG: 948686
Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/5053
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'libglusterfs/src/syncop.c')
| -rw-r--r-- | libglusterfs/src/syncop.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c index dbc52259fe7..aa46f6219ce 100644 --- a/libglusterfs/src/syncop.c +++ b/libglusterfs/src/syncop.c @@ -89,6 +89,8 @@ synctask_yield (struct synctask *task) task->proc->sched.uc_flags &= ~_UC_TLSBASE; #endif + if (task->state != SYNCTASK_DONE) + task->state = SYNCTASK_SUSPEND; if (swapcontext (&task->ctx, &task->proc->sched) < 0) { gf_log ("syncop", GF_LOG_ERROR, "swapcontext failed (%s)", strerror (errno)); @@ -238,6 +240,7 @@ synctask_new (struct syncenv *env, synctask_fn_t fn, synctask_cbk_t cbk, newtask->gid = newtask->opframe->root->gid; INIT_LIST_HEAD (&newtask->all_tasks); + INIT_LIST_HEAD (&newtask->waitq); if (getcontext (&newtask->ctx) < 0) { gf_log ("syncop", GF_LOG_ERROR, @@ -530,6 +533,7 @@ __synclock_lock (struct synclock *lock) /* called within a synctask */ list_add_tail (&task->waitq, &lock->waitq); pthread_mutex_unlock (&lock->guard); + synctask_yawn (task); synctask_yield (task); /* task is removed from waitq in unlock, * under lock->guard.*/ @@ -686,6 +690,7 @@ __syncbarrier_wait (struct syncbarrier *barrier, int waitfor) list_add_tail (&task->waitq, &barrier->waitq); { pthread_mutex_unlock (&barrier->guard); + synctask_yawn (task); synctask_yield (task); pthread_mutex_lock (&barrier->guard); } |