From: Eric Sandeen <sandeen@redhat.com>
To: Prashant Shah <pshah.mumbai@gmail.com>
Cc: linux-ext4@vger.kernel.org
Subject: Re: freeze_bdev hangs
Date: Fri, 05 Oct 2012 12:33:26 -0500 [thread overview]
Message-ID: <506F19E6.8030005@redhat.com> (raw)
In-Reply-To: <CAD6i1f+fzh-z+Xr6V2gHBzq4kmJzPcfre91g=q6fJ7P_5nY0Zw@mail.gmail.com>
On 10/5/12 6:58 AM, Prashant Shah wrote:
> Hi,
>
> I am writing a filter driver for ext3 in which it replaces the block
> device request queue 'make_request_fn' with the driver custom
> function. Calling freeze_bdev() or freeze_super() before replacing the
> 'make_request_fn' hangs the kernel. What am I doing wrong ? Will this
> method work ?
I haven't looked at your custom code, but freeze has changed a bit lately,
and "hangs" is a very vague description
For starters I'd try a sysrq-w when the system "hangs" and see where things
are at, that would offer you some clues.
-Eric
next prev parent reply other threads:[~2012-10-05 17:33 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-05 11:58 freeze_bdev hangs Prashant Shah
2012-10-05 17:33 ` Eric Sandeen [this message]
2012-10-08 7:43 ` Prashant Shah
2012-10-08 16:19 ` Jan Kara
2012-10-08 16:35 ` Prashant Shah
2012-10-09 21:49 ` Jan Kara
2012-10-12 16:08 ` Prashant Shah
2012-12-04 13:10 ` Prashant Shah
2012-10-08 18:21 ` Eric Sandeen
2012-10-08 18:48 ` Prashant Shah
2012-10-09 5:13 ` Prashant Shah
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