From: john stultz <johnstul@us.ibm.com>
To: Serge Belyshev <belyshev@depni.sinp.msu.ru>
Cc: Ingo Molnar <mingo@elte.hu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RT] fix delay in do_vgettimeofday() in arch/x86_64/kernel/vsyscall.c
Date: Fri, 09 Dec 2005 18:33:40 -0800 [thread overview]
Message-ID: <1134182041.4002.10.camel@leatherman> (raw)
In-Reply-To: <87d5k6ukky.fsf@foo.vault.bofh.ru>
On Fri, 2005-12-09 at 22:38 +0300, Serge Belyshev wrote:
>
> There are occasional very very long (30..60 sec) delays happening when calling
> gettimeofday() vsyscall on x86_64 with 2.6.14-rt22 kernel.
>
> These delays come from while() looping over invalid data that are
> going to be discarded by seqlock.
Ah, good catch! I just included a similar change (moved all the math
outside the lock) in my own tree.
Thanks for finding this!
-john
next prev parent reply other threads:[~2005-12-10 2:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-09 19:38 [RT] fix delay in do_vgettimeofday() in arch/x86_64/kernel/vsyscall.c Serge Belyshev
2005-12-10 2:33 ` john stultz [this message]
2005-12-10 20:56 ` Fernando Lopez-Lezcano
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