Messages in this thread | | | Date | Thu, 26 Mar 2009 15:57:25 -0700 | From | Andrew Morton <> | Subject | Re: ext3 IO latency measurements (was: Linux 2.6.29) |
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On Thu, 26 Mar 2009 15:39:53 -0700 (PDT) Linus Torvalds <torvalds@linux-foundation.org> wrote:
> On Thu, 26 Mar 2009, Jan Kara wrote: > > > > Reads are measurably better with the patch - the test with cat you > > describe below took ~0.5s per file without the patch and always less than > > 0.02s with the patch. So it seems to help something. > > That would seem to be a _huge_ improvement.
It's strange that we still don't have an ext3_writepages(). Open a transaction, do a large pile of writes, close the transaction again. We don't even have a data=writeback writepages() implementation, which should be fairly simple.
Bizarre.
Mingming had a shot at it a few years ago and I think Badari did as well, but I guess it didn't work out.
Falling back to generic_writepages() on our main local fs is a bit lame.
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