linux-kernel - Re: [PATCH 1/4] mm: vmscan: Correct use of pgdat_balanced in sleeping

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

Message-ID: <20110513142817.GQ16531@cmpxchg.org>
Date:	Fri, 13 May 2011 16:28:17 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Colin King <colin.king@...onical.com>,
	Raghavendra D Prabhu <raghu.prabhu13@...il.com>,
	Jan Kara <jack@...e.cz>, Chris Mason <chris.mason@...cle.com>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	Rik van Riel <riel@...hat.com>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 1/4] mm: vmscan: Correct use of pgdat_balanced in
 sleeping_prematurely

On Fri, May 13, 2011 at 03:03:21PM +0100, Mel Gorman wrote:
> Johannes Weiner poined out that the logic in commit [1741c877: mm:
> kswapd: keep kswapd awake for high-order allocations until a percentage
> of the node is balanced] is backwards. Instead of allowing kswapd to go
> to sleep when balancing for high order allocations, it keeps it kswapd
> running uselessly.
> 
> From-but-was-not-signed-off-by: Johannes Weiner <hannes@...xchg.org>

Thanks for picking it up, Mel.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>

> Will-sign-off-after-Johannes: Mel Gorman <mgorman@...e.de>
> ---
>  mm/vmscan.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index f6b435c..af24d1e 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -2286,7 +2286,7 @@ static bool sleeping_prematurely(pg_data_t *pgdat, int order, long remaining,
>  	 * must be balanced
>  	 */
>  	if (order)
> -		return pgdat_balanced(pgdat, balanced, classzone_idx);
> +		return !pgdat_balanced(pgdat, balanced, classzone_idx);
>  	else
>  		return !all_zones_ok;
>  }
> -- 
> 1.7.3.4
--
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/