Re: [PATCH] Btrfs: kill max_extent mount option

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On Mon, Mar 22, 2010 at 09:33:04AM +0800, Shaohua Li wrote:
> On Sat, Mar 20, 2010 at 02:07:23AM +0800, Josef Bacik wrote:
> > As Yan pointed out, theres not much reason for all this complicated math to
> > account for file extents being split up into max_extent chunks, since they are
> > likely to all end up in the same leaf anyway.  Since there isn't much reason to
> > use max_extent, just remove the option altogether so we have one less thing we
> > need to test.  Thanks,
> Since we sometimes have very big extents like several hundered mega bytes, just
> curious could removing max_extent limit cause more lock contentation for extent locks?

The default for the max_extent option is (u64)-1.  So, in general it was
meant to force smaller extents as part of testing.

-chris

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