On Tue, 2005-07-26 at 16:07 -0700, Andrew Morton wrote:
> Badari Pulavarty <[email protected]> wrote:
> >
> > Here is the data with 5 ext2 filesystems. I also collected /proc/meminfo
> > every 5 seconds. As you can see, we seem to dirty 6GB of data in 20
> > seconds of starting the test. I am not sure if its bad, since we have
> > lots of free memory..
>
> It's bad. The logic in balance_dirty_pages() should block those write()
> callers as soon as we hit 40% dirty memory or whatever is in
> /proc/sys/vm/dirty_ratio. So something is horridly busted.
>
> Can you try reducing the number of filesystems even further?
Single ext2 filesystem. We still dirty pretty quickly (data collected
every 5 seconds).
# grep Dirty OUT
Dirty: 312 kB
Dirty: 1121852 kB
Dirty: 2896952 kB
Dirty: 4344564 kB
Dirty: 5310856 kB
Dirty: 5507812 kB
Dirty: 5714884 kB
Dirty: 5865132 kB
Dirty: 6004276 kB
Dirty: 6206544 kB
Dirty: 6380524 kB
Dirty: 6583200 kB
Dirty: 6727296 kB
Dirty: 6708564 kB
Dirty: 6733768 kB
Dirty: 6737868 kB
Thanks,
Badari
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