lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 22 May 2014 20:45:04 +0200
From:	Vlastimil Babka <>
To:	Andrew Morton <>
CC:	Mel Gorman <>, Joonsoo Kim <>,
	Johannes Weiner <>, Jan Kara <>,
	Michal Hocko <>, Hugh Dickins <>,
	Peter Zijlstra <>,
	Dave Hansen <>,
	Linux Kernel <>,
	Linux-MM <>,
	Linux-FSDevel <>
Subject: Re: [PATCH 09/19] mm: page_alloc: Use word-based accesses for get/set
 pageblock bitmaps

On 22.5.2014 20:23, Andrew Morton wrote:
> On Thu, 22 May 2014 11:24:23 +0200 Vlastimil Babka <> wrote:
>>> In a test running dd onto tmpfs the overhead of the pageblock-related
>>> functions went from 1.27% in profiles to 0.5%.
>>> Signed-off-by: Mel Gorman <>
>>> Acked-by: Vlastimil Babka <>
>> Hi, I've tested if this closes the race I've been previously trying to fix
>> with the series in
>> And indeed with this patch I wasn't able to reproduce it in my stress test
>> (which adds lots of memory isolation calls) anymore. So thanks to Mel I can
>> dump my series in the trashcan :P
>> Therefore I believe something like below should be added to the changelog,
>> and put to stable as well.
> OK, I made it so.


> Miraculously, the patch applies OK to 3.14.  And it compiles!

Great, shipping time!

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists