linux-kernel - Re: [PATCH -mm] remove __GFP_NO

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Message-ID: <20120725233631.GC14411@bbox>
Date:	Thu, 26 Jul 2012 08:36:31 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	linux-mm@...ck.org, Andrea Arcangeli <aarcange@...hat.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>,
	David Woodhouse <David.Woodhouse@...el.com>
Subject: Re: [PATCH -mm] remove __GFP_NO_KSWAPD fixes

On Wed, Jul 25, 2012 at 02:51:19PM -0400, Rik van Riel wrote:
> Turns out I missed two spots where __GFP_NO_KSWAPD is used.
> 
> The removal from the trace code is obvious, since the flag
> got removed there is no need to print it.
> 
> For mtdcore.c, now that memory compaction has been fixed,
> we should no longer see large swap storms from an attempt
> to allocate a large buffer, removing the need to specify
> __GFP_NO_KSWAPD.
> 
> Signed-off-by: Rik van Riel <riel@...hat.com>
Reviewed-by: Minchan Kim <minchan@...nel.org>

You should have tidied up comment of the function.
I hope Andrew can do it if he see this review.

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index fcfce24..6ff1308 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -1065,8 +1065,7 @@ EXPORT_SYMBOL_GPL(mtd_writev);
  * until the request succeeds or until the allocation size falls below
  * the system page size. This attempts to make sure it does not adversely
  * impact system performance, so when allocating more than one page, we
- * ask the memory allocator to avoid re-trying, swapping, writing back
- * or performing I/O.
+ * ask the memory allocator to avoid re-trying.
  *
  * Note, this function also makes sure that the allocated buffer is aligned to
  * the MTD device's min. I/O unit, i.e. the "mtd->writesize" value.

Thanks.

-- 
Kind regards,
Minchan Kim
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