| To: | Dave Chinner <david@xxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx |
|---|---|
| Subject: | Re: [PATCH 3/4] writeback: pay attention to wbc->nr_to_write in write_cache_pages |
| From: | tytso@xxxxxxx |
| Date: | Sun, 25 Apr 2010 22:45:27 -0400 |
| In-reply-to: | <20100426024302.GC13043@xxxxxxxxx> |
| Mail-followup-to: | tytso@xxxxxxx, Dave Chinner <david@xxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx |
| References: | <1271731314-5893-1-git-send-email-david@xxxxxxxxxxxxx> <1271731314-5893-4-git-send-email-david@xxxxxxxxxxxxx> <20100425033315.GC667@xxxxxxxxx> <20100426014908.GD11437@dastard> <20100426024302.GC13043@xxxxxxxxx> |
| User-agent: | Mutt/1.5.20 (2009-06-14) |
On Sun, Apr 25, 2010 at 10:43:02PM -0400, tytso@xxxxxxx wrote:
> Have you tested with multiple files that are subject to writeout at
> the same time? After all, if your I/O allocator does a great job of
> keeping the files contiguous in chunks larger tham 4MB, then if you
> have two or more files that need to be written out, the page allocator
> will round robin between the two files in 4MB chunks, and that might
> not be considered an ideal I/O pattern.
Argh. Sorry for not proof reading better before hitting the send
key....
s/tham/than/
s/page allocator/writeback code/
- Ted
|
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