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
| ||
|
Date: Wed, 02 Dec 2009 09:51:36 +0800 From: Gui Jianfeng <guijianfeng@...fujitsu.com> To: Vivek Goyal <vgoyal@...hat.com> CC: linux-kernel@...r.kernel.org, jens.axboe@...cle.com, nauman@...gle.com, dpshah@...gle.com, lizf@...fujitsu.com, ryov@...inux.co.jp, fernando@....ntt.co.jp, s-uchida@...jp.nec.com, taka@...inux.co.jp, jmoyer@...hat.com, righi.andrea@...il.com, m-ikeda@...jp.nec.com, czoccolo@...il.com, Alan.Brunelle@...com Subject: Re: Block IO Controller V4 Vivek Goyal wrote: > Hi Jens, > > This is V4 of the Block IO controller patches on top of "for-2.6.33" branch > of block tree. > > A consolidated patch can be found here: > > http://people.redhat.com/vgoyal/io-controller/blkio-controller/blkio-controller-v4.patch > Hi Vivek, It seems this version doesn't work very well for "direct(O_DIRECT) sequence read" mode. For example, you can create group A and group B, then assign weight 100 to group A and weight 400 to group B, and you run "direct sequence read" workload in group A and B simultaneously. Ideally, we should see 1:4 disk time differentiation for group A and B. But actually, I see almost 1:2 disk time differentiation for group A and B. I'm looking into this issue. BTW, V3 works well for this case. Thanks, Gui -- 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/
Powered by blists - more mailing lists