On Wednesday 02 March 2016 01:44:16 Christoph Hellwig wrote: > On Wed, Mar 02, 2016 at 10:15:02AM +0100, Arnd Bergmann wrote: > > I'm missing the background on this, just saw the patch fly by, > > so sorry if this has been asked before: > > > > Why do you want to invalidate the cache? Is this to save RAM > > or is something else going to write here and you have to invalidate > > it for correctness? > > BLKZEROOUT can be though as a direct I/O operation - it issues a > WRITE SAME (or similar) command straight to the device to zero > the specified range. If there was cached data for this range it would > now be stale. Ok, got it. Thanks, Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
