Christoph Hellwig <hch@xxxxxxxxxxxxx> writes: > On Tue, May 10, 2011 at 10:59:15AM +0900, OGAWA Hirofumi wrote: >> I'd like to know those patches are on what state. Waiting in writeback >> page makes slower, like you mentioned it (I guess it would more >> noticeable if device was slower that like FAT uses). And I think >> currently it doesn't help anything others for blk-integrity stuff >> (without other technic, it doesn't help FS consistency)? > > It only makes things slower if we rewrite a region in a file that is > currently undergoing writeback. I'd be interested to know about real > life applications doing that, and if they really are badly affect we > should help them to work around that in userspace, e.g. by adding a > fadvice will rewrite call that might be used to never write back that > regions without an explicit fsync call. Isn't it reallocated blocks too, and metadata too? Thanks. -- OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>