linux-kernel - Re: Do not overload dispatch queue (Was: Re: IO scheduler based IO controller V10)

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: <20091003151445.GF31616@kernel.dk>
Date:	Sat, 3 Oct 2009 17:14:45 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Mike Galbraith <efault@....de>
Cc:	Vivek Goyal <vgoyal@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de>,
	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, dm-devel@...hat.com,
	nauman@...gle.com, dpshah@...gle.com, lizf@...fujitsu.com,
	mikew@...gle.com, fchecconi@...il.com, paolo.valente@...more.it,
	ryov@...inux.co.jp, fernando@....ntt.co.jp, jmoyer@...hat.com,
	dhaval@...ux.vnet.ibm.com, balbir@...ux.vnet.ibm.com,
	righi.andrea@...il.com, m-ikeda@...jp.nec.com, agk@...hat.com,
	akpm@...ux-foundation.org, peterz@...radead.org,
	jmarchan@...hat.com, riel@...hat.com
Subject: Re: Do not overload dispatch queue (Was: Re: IO scheduler based IO
	controller V10)

On Sat, Oct 03 2009, Mike Galbraith wrote:
> On Sat, 2009-10-03 at 16:28 +0200, Jens Axboe wrote:
> > On Sat, Oct 03 2009, Mike Galbraith wrote:
> > > On Sat, 2009-10-03 at 09:56 -0400, Vivek Goyal wrote:
> > > 
> > > > I have kept the overload delay period as "cfq_slice_sync" same as Mike had
> > > > done. We shall have to experiment what is a good waiting perioed. Is 100ms
> > > > too long if we are waiting for a request from same process which recently
> > > > finished IO and we did not enable idle on it.
> > > > 
> > > > I guess we can tweak the delay period as we move along.
> > > 
> > > I kept the delay period very short to minimize possible damage. Without
> > > the idle thing, it wasn't enough, but with, worked a treat, as does your
> > > patch.
> > 
> > Can you test the current line up of patches in for-linus? It has the
> > ramp up I talked about included as well.
> 
> Well, it hasn't hit git.kernel.org yet, it's at...
> 
> * block-for-linus        1d22351 cfq-iosched: add a knob for desktop interactiveness

It's the top three patches here, kernel.org sync sometimes takes a
while...

http://git.kernel.dk/?p=linux-2.6-block.git;a=shortlog;h=refs/heads/for-linus

-- 
Jens Axboe

--
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/