linux-kernel - Re: [PATCH] mm: get rid of unnecessary overhead of trace_mm_page_alloc

lists.openwall.net		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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Wed, 30 Oct 2013 15:20:57 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	kosaki.motohiro@...il.com
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Subject: Re: [PATCH] mm: get rid of unnecessary overhead of
 trace_mm_page_alloc_extfrag()

On Fri, Oct 25, 2013 at 12:42:47PM -0400, kosaki.motohiro@...il.com wrote:
> From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> 
> In general, every tracepoint should be zero overhead if it is disabled.
> However, trace_mm_page_alloc_extfrag() is one of exception. It evaluate
> "new_type == start_migratetype" even if tracepoint is disabled.
> 
> However, the code can be moved into tracepoint's TP_fast_assign() and
> TP_fast_assign exist exactly such purpose. This patch does it.
> 
> Cc: Mel Gorman <mgorman@...e.de>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

Acked-by: Mel Gorman <mgorman@...e.de>

-- 
Mel Gorman
SUSE Labs
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/