On Mon 02-07-12 11:33:33, Eric Sandeen wrote: > On 07/01/2012 10:16 PM, Zheng Liu wrote: > > Hi Eric, > > > > Could you please run this test with 'journal_async_commit' flag. In my > > previous test, this feature can dramatically improve the performance of > > uninitialized extent conversion. > > > > I have sent an email to do a similar test [1]. In that email, I do a > > similar test and the journal_async_commit flag quite can improve the > > performance. > > I can try to find time for that, but so far I haven't actually seen any > severe impact of conversion on a non-debug kernel. And didn't Jan think > that journal_async_commit was fatally flawed? Yes, that option is broken and basically unfixable for data=ordered mode (see http://comments.gmane.org/gmane.comp.file-systems.ext4/30727). For data=writeback it works fine AFAICT. Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
