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gfs2: Don't sleep during glock hash walk 

In flush_delete_work, instead of flushing each individual pending
delayed work item, cancel and re-queue them for immediate execution.
The waiting isn't needed here because we're already waiting for all
queued work items to complete in gfs2_flush_delete_work.  This makes the
code more efficient, but more importantly, it avoids sleeping during a
rhashtable walk, inside rcu_read_lock().

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2020-06-10 18:31:56 +02:00
parent 58e08e8d83
commit 34244d711d
1 changed files with 4 additions and 1 deletions
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5
fs/gfs2/glock.c
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@ -1899,7 +1899,10 @@ bool gfs2_delete_work_queued(const struct gfs2_glock *gl)
static void flush_delete_work(struct gfs2_glock *gl)
{
flush_delayed_work(&gl->gl_delete);
if (cancel_delayed_work(&gl->gl_delete)) {
queue_delayed_work(gfs2_delete_workqueue,
&gl->gl_delete, 0);
}
gfs2_glock_queue_work(gl, 0);
}