On Fri, Mar 22, 2013 at 08:21:56PM +0000, Ben Hutchings wrote: > On Fri, 2013-03-22 at 13:11 -0700, Darrick J. Wong wrote: > > The new writethrough strategy for dm-cache issues a bio to the origin device, > > remaps the bio to the cache device, and issues the bio to the cache device. > > However, the block layer modifies bi_sector and bi_size, so we need to preserve > > these or else nothing gets written to the cache (bi_size == 0). This fixes the > > problem where someone writes a block through the cache, but a subsequent reread > > (from the cache) returns old contents. > > > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > --- > [...] > > This is not the correct way to submit a change to stable. See > Documentation/stable_kernel_rules.txt Frankly, I'm not sure why agk sent the 3.9-fixes pull request to -stable. 7 of the 10 commits are for dm-cache, and dm-cache is a new feature for 3.9. I probably could have dropped -stable from the cc: list when I started complaining about bugs. :) Sorry about the noise. --D > > Ben. > > -- > Ben Hutchings > Make three consecutive correct guesses and you will be considered an expert. -- 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