Messages in this thread | | | Date | Sat, 4 Aug 2007 19:17:24 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 00/23] per device dirty throttling -v8 |
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* Diego Calleja <diegocg@gmail.com> wrote:
> El Sat, 4 Aug 2007 18:37:33 +0200, Ingo Molnar <mingo@elte.hu> escribió: > > > thousands of applications. So for most file workloads we give > > Windows a 20%-30% performance edge, for almost nothing. (for > > RAM-starved kernel builds the performance difference between atime > > and noatime+nodiratime setups is more on the order of 40%) > > Just curious - do you have numbers with relatime?
nope. Stupid question, i just tried it and got this:
EXT3-fs: Unrecognized mount option "relatime" or missing value
i've got util-linux-2.13-0.46.fc6 and 2.6.22 on that box, shouldnt that be recent enough? As far as i can see it from the kernel-side code, this works on the general VFS level and hence should be supported by ext3 already.
even relatime means one extra write IO after a file has been created, but at least for read-mostly files it avoids the continuous atime update.
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