From: Jakob Oestergaard <jakob@unthought.net>
To: Leif Nixon <nixon@nsc.liu.se>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Cache invalidation bug in NFS v3 - trivially reproducible
Date: Tue, 11 Oct 2005 11:22:33 +0200 [thread overview]
Message-ID: <20051011092232.GA1625@unthought.net> (raw)
In-Reply-To: <m33bn8bet4.fsf@nammatj.nsc.liu.se>
On Tue, Oct 11, 2005 at 11:09:27AM +0200, Leif Nixon wrote:
...
>
> Now client n2 is stuck in a state where it uses its old cached data
> forever (or at least for several hours):
>
> NFS client n1 NFS client n2
>
> $ cat f
> 2
> $ cat f
> 1
I can confirm this on NFSv3 UDP export from patched 2.6.11.11 server
(dual opteron 64-bit kernel) to two different SMP (32-bit x86) clients
with 2.6.12.4 and 2.6.11.11 kernels.
There are definitely timing issues - in order to reproduce the problem I
had to use "touch . ; echo 2 > r" and "touch r; cat r" on the clients -
I couldn't type the commands quickly enough one-by-one.
But right now I have:
[phoenix:joe] $ cat r
2
[raven:joe] $ cat r
1
Beautiful :)
--
/ jakob
next prev parent reply other threads:[~2005-10-11 9:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-11 9:09 Cache invalidation bug in NFS v3 - trivially reproducible Leif Nixon
2005-10-11 9:22 ` Jakob Oestergaard [this message]
2005-10-11 14:47 ` Trond Myklebust
2005-10-12 4:31 ` Willy Tarreau
2005-10-13 22:34 ` Trond Myklebust
2005-10-14 13:34 ` Leif Nixon
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