On Mon, 2008-11-10 at 13:39 -0700, Matthew Wilcox wrote: > On Thu, Nov 06, 2008 at 09:43:23AM -0500, Ric Wheeler wrote: > > I have been thinking about whether or not we can (and should) do > > anything more than our current best effort to send down large chunks > > (note that the "chunk" size can range from reasonable sizes like 8KB or > > so up to close to 1MB!). > > One of the proposals in this thread (that has got buried somewhere) was > to expand any discard request sent down from the filesystem to encompass > all the adjacent free space. I've checked with our SSD people and > they're fine with this idea. > > dwmw2 says "it isn't actually that hard in FAT" and then interjects some > personal opinion about this solution ;-) > > Is it hard in XFS? btrfs? ext2? Does anyone have a problem with this > as a solution? > Btrfs needs some extra checking to make sure the extents really are free (and won't magically reappear after a crash), but it is at least possible. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
