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Message-Id: <20090804145935.e258cd2f.akpm@linux-foundation.org>
Date: Tue, 4 Aug 2009 14:59:35 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Hugh Dickins <hugh.dickins@...cali.co.uk>
Cc: ieidus@...hat.com, aarcange@...hat.com, riel@...hat.com,
chrisw@...hat.com, nickpiggin@...oo.com.au,
linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 5/12] ksm: keep quiet while list empty
On Mon, 3 Aug 2009 13:14:03 +0100 (BST)
Hugh Dickins <hugh.dickins@...cali.co.uk> wrote:
> + if (ksmd_should_run()) {
> schedule_timeout_interruptible(
> msecs_to_jiffies(ksm_thread_sleep_millisecs));
> } else {
> wait_event_interruptible(ksm_thread_wait,
> - (ksm_run & KSM_RUN_MERGE) ||
> - kthread_should_stop());
> + ksmd_should_run() || kthread_should_stop());
> }
Yields
if (ksmd_should_run()) {
schedule_timeout_interruptible(
msecs_to_jiffies(ksm_thread_sleep_millisecs));
} else {
wait_event_interruptible(ksm_thread_wait,
ksmd_should_run() || kthread_should_stop());
}
can it be something like
wait_event_interruptible_timeout(ksm_thread_wait,
ksmd_should_run() || kthread_should_stop(),
msecs_to_jiffies(ksm_thread_sleep_millisecs));
?
That would also reduce the latency in responding to kthread_should_stop().
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