Re: [PATCH 2/2] mm: make do_writepages() use plugging

From: Christoph Hellwig
Date: Fri Feb 03 2012 - 09:08:51 EST

On Fri, Feb 03, 2012 at 09:38:23PM +0800, Wu Fengguang wrote:
> On Fri, Feb 03, 2012 at 06:57:06PM +0530, Amit Sahrawat wrote:
> > This will cover all the invocations for writepages to be called with
> > plugging support.
> Thanks. I'll test it on the major filesystems. But would you
> name a few filesystems that are expected to benefit from it?
> It's not obvious because some FS ->writepages eventually calls
> generic_writepages() which already does plugging.

Ant that's exactly where it should stay instead of beeing sprinkled all
over the VM code.

NAK to the patch.

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