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vhost: Fix livepatch timeouts in vhost_worker() 

Livepatch timeouts were reported due to busy vhost_worker() kthreads.
Now that cond_resched() can do livepatch task switching, use
cond_resched() in vhost_worker().  That's the better way to
conditionally call schedule() anyway.

Reported-by: Seth Forshee (DigitalOcean) <sforshee@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Seth Forshee (DigitalOcean) <sforshee@kernel.org>
Link: https://lore.kernel.org/r/509f6ea6fe6505f0a75a66026ba531c765ef922f.1677257135.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf 2023-02-24 08:50:01 -08:00 committed by Peter Zijlstra
parent e3ff7c609f
commit 05bfb338fa
1 changed files with 1 additions and 2 deletions
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3
drivers/vhost/vhost.c
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@ -363,8 +363,7 @@ static int vhost_worker(void *data)
kcov_remote_start_common(dev->kcov_handle);
work->fn(work);
kcov_remote_stop();
if (need_resched())
schedule();
cond_resched();
}
}
kthread_unuse_mm(dev->mm);