linux-kernel - Re: [Alsa-user] new source of MIDI playback slow-down identified - 5a03b051ed87e72b959f32a86054e1142ac4cf55 thp: use compaction in kswapd for GFP

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]

Date:	Tue, 22 Feb 2011 17:15:13 +0100
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Clemens Ladisch <cladisch@...glemail.com>
Cc:	Arthur Marsh <arthur.marsh@...ernode.on.net>,
	alsa-user@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [Alsa-user] new source of MIDI playback slow-down identified -
 5a03b051ed87e72b959f32a86054e1142ac4cf55 thp: use compaction in kswapd for
 GFP_ATOMIC order > 0

On Tue, Feb 22, 2011 at 02:40:47PM +0100, Andrea Arcangeli wrote:
>  	spin_lock_irq(&zone->lru_lock);
>  	for (; low_pfn < end_pfn; low_pfn++) {
>  		struct page *page;
> +
> +		cond_resched();
> +

my bad, see the above spin_lock_irq oops...

I attached two replacement patches to apply in order (both of them
should be applied at the same time on top of git upstream, and they
shouldn't lockup this time).

View attachment "kswapd-high_wmark" of type "text/plain" (1853 bytes)

View attachment "compaction-kswapd" of type "text/plain" (2231 bytes)