Re: Kernel BUG at fs/mpage.c:489

From: Andrew Morton
Date: Wed Feb 13 2008 - 04:35:05 EST


On Wed, 13 Feb 2008 20:24:03 +1100 Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:

> BTW is it really true that the buffer can never be locked by
> anything else at this point?

It has been for the past five or six years. With the page locked, nobody
else can get at that page.

> What about fsync_buffers_list?

They're metadata buffers, not regular file data. Things might get ugly if
IO to /dev/sda went via that path, but it doesn't.

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