linux-kernel - Re: [madvise] kernel BUG at block/blk-core.c:2981!

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Message-ID: <20130116094157.GC12099@kernel.dk>
Date:	Wed, 16 Jan 2013 10:41:57 +0100
From:	Jens Axboe <axboe@...nel.dk>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Shaohua Li <shli@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [madvise]  kernel BUG at block/blk-core.c:2981!

On Wed, Jan 16 2013, Fengguang Wu wrote:
> Shaohua,
> 
> I tried bisect and 0d18d770b9180ffc2c3f63b9eb8406ef80105e05 is the first bad commit.
> 
> commit 0d18d770b9180ffc2c3f63b9eb8406ef80105e05
> Author: Shaohua Li <shli@...nel.org>
> Date:   Sat Jan 12 10:56:05 2013 +1100
> 
>     mm: make madvise(MADV_WILLNEED) support swap file prefetch
> 
>     Make madvise(MADV_WILLNEED) support swap file prefetch.  If memory is
>     swapout, this syscall can do swapin prefetch.  It has no impact if the
>     memory isn't swapout.
> 
>     Signed-off-by: Shaohua Li <shli@...ionio.com>
>     Cc: Hugh Dickins <hughd@...gle.com>
>     Cc: Rik van Riel <riel@...hat.com>
>     Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>

Unbalanced path in that patch, see this patch:

https://patchwork.kernel.org/patch/1973481/

-- 
Jens Axboe

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