Re: [PATCH] cramfs corruption after BLKFLSBUF on loop device

[Andrew Morton]

On Thu, 1 Jun 2006 12:12:00 -0700
Andrew Morton <akpm@xxxxxxxx> wrote:

> I'd have
> thought that it'd be appropriate to take i_mutex while running
> invalidate_inode_pages().

Let me add: it'd be appropriate, but also difficult -
invalidate_inode_pages() is called from all sorts of contexts, including
inside spinlock.

A quickie fix would be to take i_mutex at the top level, on entry to the
ioctl.  But that'll only fix the BLKFLSBUF case.

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