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SubjectRe: [PATCH -v6 0/2] Fixing the issue with memory-mapped file times
2008/1/18, Miklos Szeredi <miklos@szeredi.hu>:
> > 4. Performance test was done using the program available from the
> > following link:
> >
> > http://bugzilla.kernel.org/attachment.cgi?id=14493
> >
> > Result: the impact of the changes was negligible for files of a few
> > hundred megabytes.
>
> Could you also test with ext4 and post some numbers? Afaik, ext4 uses
> nanosecond timestamps, so the time updating code would be exercised
> more during the page faults.
>
> What about performance impact on msync(MS_ASYNC)? Could you please do
> some measurment of that as well?

I'll do the measurements for the MS_ASYNC case and for the Ext4 filesystem.

>
> Thanks,
> Miklos
>
>


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