| 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: Mon, 28 Jun 2010 20:50:44 +0200 From: Jens Axboe <axboe@...nel.dk> To: Jeff Moyer <jmoyer@...hat.com> CC: linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/2] cfq: always return false from should_idle if slice_idle is set to zero On 28/06/10 20.41, Jeff Moyer wrote: > Jens Axboe <axboe@...nel.dk> writes: > >> On 21/06/10 21.49, Jeff Moyer wrote: >>> Hi, >>> >>> In testing a competing fsync-ing process and a sequential reader on >>> mid-grade storage, I found that cfq was incapable of achieving the I/O >>> rates of deadline, no matter how it was tuned. Investigation, and insight >>> from Vivek (mostly the latter), led to identifying that we were still >>> idling for the last queue in the service tree. >>> >>> Modifying cfq_should_idle to not idle when slice_idle is set to zero got >>> us much closer to the performance of deadline for this workload. I have >>> one follow-on patch that gets us on-par with deadline, but I think this >>> patch stands alone. >>> >>> Comments, as always, are appreciated. >> >> This looks good. > > So.... applied to which branch? Not applied yet, unless I explicitly say it's applied, then it's not necessarily in any public git tree yet. But this will go into .35. -- 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/
Powered by blists - more mailing lists