Messages in this thread | | | Date | Fri, 25 Apr 2008 00:04:33 +0200 | From | "Carl Henrik Lunde" <> | Subject | Re: [RFC][PATCH 0/3] Skip I/O merges when disabled |
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On Thu, Apr 24, 2008 at 4:13 PM, Alan D. Brunelle <Alan.Brunelle@hp.com> wrote: [...] > o The kernel already exports stats on merges, so the daemon could watch > those stats in comparison to the number of I/Os submitted. If it > determined that merge attempts were not being very successful, it could > turn off merges for a period of time. Later it could turn them back on, > watch for a while, and repeat. > > Does this sound better/worthwhile?
It may be more interesting to make a program which makes some helpful suggestions after looking at a blktrace file. The program could for example suggest changing the I/O scheduler, increasing a parameter such as slice_sync, or disable merges.
-- Carl Henrik
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