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Re: Pre-approval request for dpkg sync() changes for squeeze

On Tue, Nov 09, 2010 at 07:50:23PM +0100, Philipp Kern wrote:
> On Fri, Oct 22, 2010 at 11:35:54AM +0200, Guillem Jover wrote:
> >   1) Switch back from sync() to fsync() before rename() (while keeping
> >      the sync() code around for the benefit of other distributions
> >      that might not want to switch just yet). So to avoid unrelated
> >      I/O when there's background work being done for example. This
> >      hack also only works on Linux where sync() is synchronous, so
> >      it would unify that code path for all dpkg supported platforms.
> > 
> >      Bug: #588339
> > 
> >   <http://git.hadrons.org/?p=debian/dpkg/dpkg.git;a=commitdiff;h=87740373>
> I'm still not sure we have all needed information.  Would you mind doing
> a matrix what this change would cause?  I.e. if we get performance
> regressions on ext4, btrfs or even ext3 with the squeeze kernel (we're
> really only interested in that one, not some random other revision)
> or if we even get data safety regressions.

I also forgot to throw nfs into the picture.

Kind regards,
Philipp Kern

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