From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Mason Subject: Re: udpated data logging available Date: 26 Jun 2003 08:53:47 -0400 Message-ID: <1056632026.20899.39.camel@tiny.suse.com> References: <1055764071.24111.650.camel@tiny.suse.com> <200306260216.41204.christian.mayrhuber@gmx.net> <1056592066.20899.10.camel@tiny.suse.com> <200306261342.08725.Dieter.Nuetzel@hamburg.de> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <200306261342.08725.Dieter.Nuetzel@hamburg.de> List-Id: Content-Type: text/plain; charset="iso-8859-1" To: Dieter =?ISO-8859-1?Q?N=FCtzel?= Cc: Christian Mayrhuber , reiserfs-list@namesys.com On Thu, 2003-06-26 at 07:42, Dieter N=FCtzel wrote: > > Great to hear, thanks for giving it a try. io-stalls-6 helped most when > > you've got multiple devices and a streaming write to one was slowing > > down all the others. -7 added in a tweaked form of Andrea's elevator > > latency fixes, and they make a big difference when there's a lot of > > writes to the drive you're trying to read from. >=20 > So, does it apply to 2.4.21-aa1 (latest is 2.4.21rc8aa1) cleanly? ;-) >=20 No, io-stalls-7 is mostly in rc8aa1 already. The major difference is that andrea changed blk_finished_io and I added a new func to keep compatibility for external drivers. There are a few areas where he and I chose different ways of doing things, if you're interested in helping add some measurements to our debate, I can make you a patch against aa1. > > Hopefully we'll be able to hash out something suitable for 2.4.22-pre. >=20 > 2.4.22-pre1 is out form some days... Yes. Almost all my latency testing was done on data logging + the jh-2 patch, so I'm much more confident now in that code. Hopefully the merging will start shortly, Oleg has a queue of things he wants to get in, and we're trying to keep the rate of changes at something manageable. (quick clarification, io-stalls-7 is entirely unrelated to reiserfs, I posted it here because I thought there might be some willing testers ;-) -chris