On Thu 21-05-15 09:51:59, gregkh@xxxxxxxxxxxxxxxxxxx wrote: > On Thu, May 21, 2015 at 05:28:28PM +0800, Alex Shi wrote: > > Hi Greg, > > > > It was reported this commit could save few seconds sometime in > > consequence writing on smart phone. > > > > commit 7afe5aa59ed3da7b6161617e7f157c7c680dc41e > > ext4: convert write_begin methods to stable_page_writes semantics > > > > > The patch helps because most of storage today doesn't require that the > > > page isn't changed while IO is in flight. That is required only for > > > data checksumming or copy-on-write semantics but ext4 does neither of > > > those. So we don't have to wait for IO completion in ext4_write_begin() > > > unless underlying storage requires it. > > > > > > Honza > > > > Seems it is a very simple and useful patch for some stable kernel, like > > lts 3.10. Would you like to pick it up? > > If Jan and Ted say it's ok, I'll queue it up. Yes, it's OK. Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html