Messages in this thread | | | Date | Thu, 23 Apr 2009 14:37:30 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [PATCH 9/9] ext3: do not throttle metadata and journal IO |
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On Wed, 22 Apr 2009 21:58:25 -0700 Andrew Morton <akpm@linux-foundation.org> wrote: > > Or at least that *someone* is > > doing so and can perhaps document how all of these knobs interact. > > After all, if they are going to be separate, and someone turns the I/O > > throttling knob without bothering to turn the write throttling knob > > --- what's going to happen? An OOM? That's not going to be very safe > > or friendly for the sysadmin who plans to be configuring the system. > > ... this problem. > Considering that low-io-limit cgroup as very slow device, the problem itself is not far from that the current kernel has. If per-bdi-dirty-ratio works well, we can write per-cgroup-dirty-ratio, I think. (I'll do if I find time.)
But yes, configuration-how-to should be documented, finally. I hope sysadmins will not use some acrobatic configuration ;)
Thanks, -Kame
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