[Ocfs2-devel] [PATCH] Treat writes as new when holes span across page boundaries
Joel Becker
jlbec at evilplan.org
Wed Feb 23 13:23:20 PST 2011
On Wed, Feb 23, 2011 at 03:00:58PM -0600, Goldwyn Rodrigues wrote:
> On Wed, Feb 23, 2011 at 1:28 PM, Joel Becker <jlbec at evilplan.org> wrote:
> > On Wed, Feb 23, 2011 at 11:13:39AM -0800, Joel Becker wrote:
> >> The calling code should have made sure we are correctly passing
> >> should_zero to all non-target pages. Having new overridden for them is
> >> wrong. So maybe we move your check inside the target_page if. It only
> >> really matters for the target page.
> >
> > Actually, I have a question: what is the clustersize of your
> > test? Because if the filesystem is 4k/4k, the write at 4096 of 32 bytes
> > should allocate a new cluster. 'new' should already be set, and your
> > check irrelevant.
>
> It is 16K and does not happen for clustersize==pagesize/blocksize.
> Don't have a machine with a bigger pagesize handy.
That's what I expected.
Joel
--
"What no boss of a programmer can ever understand is that a programmer
is working when he's staring out of the window"
- With apologies to Burton Rascoe
http://www.jlbec.org/
jlbec at evilplan.org
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