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Message-ID: <20090413181733.GA10424@redhat.com> Date: Mon, 13 Apr 2009 20:17:33 +0200 From: Oleg Nesterov <oleg@...hat.com> To: Andrew Morton <akpm@...ux-foundation.org>, David Howells <dhowells@...hat.com> Cc: Serge Hallyn <serue@...ibm.com>, Steve Dickson <steved@...hat.com>, Trond Myklebust <Trond.Myklebust@...app.com>, Al Viro <viro@...iv.linux.org.uk>, Daire Byrne <Daire.Byrne@...mestore.com>, linux-kernel@...r.kernel.org Subject: [PATCH] slow_work_thread() should do the exclusive wait slow_work_thread() sleeps on slow_work_thread_wq without WQ_FLAG_EXCLUSIVE, this means that slow_work_enqueue()->__wake_up(nr_exclusive => 1) wakes up all kslowd threads. Afaics this is not what we want, change slow_work_thread() to use prepare_to_wait_exclusive(). Signed-off-by: Oleg Nesterov <oleg@...hat.com> --- 6.30/kernel/slow-work.c~1_SW_EXCLUSIVE 2009-04-06 00:03:42.000000000 +0200 +++ 6.30/kernel/slow-work.c 2009-04-13 19:40:20.000000000 +0200 @@ -372,8 +372,8 @@ static int slow_work_thread(void *_data) vsmax *= atomic_read(&slow_work_thread_count); vsmax /= 100; - prepare_to_wait(&slow_work_thread_wq, &wait, - TASK_INTERRUPTIBLE); + prepare_to_wait_exclusive(&slow_work_thread_wq, &wait, + TASK_INTERRUPTIBLE); if (!freezing(current) && !slow_work_threads_should_exit && !slow_work_available(vsmax) && -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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