Re: [patch 9/9] mm: fix pagecache write deadlocks

[Christoph Hellwig]

On Sun, Feb 04, 2007 at 11:15:29AM +0100, Nick Piggin wrote:
> Cool, a kernel thread is calling sys_write. Fun.

There are tons of places where we possible call into ->write from
either kernel threads or at least with a kernel pointer  and set_fs/set_ds
magic.  Anything in the buffer write path that tries to touch page tables
can't work.

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