linux-kernel - Re: [PATCH 15/19 v2] tile/mm/fault.c: Port OOM changes to handle_page

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Message-ID: <4F7B2114.4000806@tilera.com>
Date:	Tue, 3 Apr 2012 12:11:00 -0400
From:	Chris Metcalf <cmetcalf@...era.com>
To:	Kautuk Consul <consul.kautuk@...il.com>
CC:	<paul.mckenney@...aro.org>,
	Lucas De Marchi <lucas.demarchi@...fusion.mobi>,
	Josh Triplett <josh@...htriplett.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 15/19 v2] tile/mm/fault.c: Port OOM changes to handle_page_fault

On 3/31/2012 8:05 AM, Kautuk Consul wrote:
> Commit d065bd810b6deb67d4897a14bfe21f8eb526ba99
> (mm: retry page fault when blocking on disk transfer) and
> commit 37b23e0525d393d48a7d59f870b3bc061a30ccdb
> (x86,mm: make pagefault killable)
>
> The above commits introduced changes into the x86 pagefault handler
> for making the page fault handler retryable as well as killable.
>
> These changes reduce the mmap_sem hold time, which is crucial
> during OOM killer invocation.
>
> Port these changes to tile.
>
> Signed-off-by: Kautuk Consul <consul.kautuk@...il.com>
> [...]
> +			 /* No need to up_read(&mm->mmap_sem) as we would
> +			 * have already released it in __lock_page_or_retry
> +			 * in mm/filemap.c.
> +			 */
>

Taken into the tile tree.  I adjusted the block comment whitespacing to
normal Linux standard.  Thanks!

-- 
Chris Metcalf, Tilera Corp.
http://www.tilera.com

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