| 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
| ||
|
Message-ID: <A24AE1FFE7AEC5489F83450EE98351BF227AB58D43@shsmsx502.ccr.corp.intel.com> Date: Fri, 8 Oct 2010 18:04:44 +0800 From: "Wu, Xia" <xia.wu@...el.com> To: Christoph Hellwig <hch@....de>, Yong Wang <yong.y.wang@...ux.intel.com> CC: Jens Axboe <jaxboe@...ionio.com>, Artem Bityutskiy <Artem.Bityutskiy@...ia.com>, "Wu, Fengguang" <fengguang.wu@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org> Subject: RE: [PATCH] bdi: use deferable timer for sync_supers task On Fri, Oct 08, 2010 at 04:35:14PM +0800, Yong Wang wrote: > > sync_supers task currently wakes up periodically for superblock > > writeback. This hurts power on battery driven devices. This patch > > turns this housekeeping timer into a deferable timer so that it > > does not fire when system is really idle. > How long can the timer be defereed? We can't simply stop writing > out data for a long time. I think the current timer value should be > the upper bound, but allowing to fire earlier to run during the > same wakeup cycle as others is fine. If the system is in sleep state, this timer can be deferred to the next wake-up interrupt. If the system is busy, this timer will fire at the scheduled time. -- 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