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Add TASKQ_NORECLAIM flag

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It has become necessary to be able to optionally disable
direct memory reclaim for certain taskqs.  To support
this the TASKQ_NORECLAIM flags has been added which sets
the PF_MEMALLOC bit for all threads in the taskq.
This commit is contained in:
Brian Behlendorf
2011-05-06 15:21:58 -07:00
parent dde6b7b137
commit 372c257233
2 changed files with 5 additions and 0 deletions
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module/spl/spl-taskq.c
+4
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@@ -371,6 +371,10 @@ taskq_thread(void *args)
ASSERT(tq);
current->flags |= PF_NOFREEZE;
/* Disable the direct memory reclaim path */
if (tq->tq_flags & TASKQ_NORECLAIM)
current->flags |= PF_MEMALLOC;
sigfillset(&blocked);
sigprocmask(SIG_BLOCK, &blocked, NULL);
flush_signals(current);