> On Sat, Feb 07, 2009 at 09:53:06AM -0500, Ric Wheeler wrote: >> I have been poked at by some vendors about the status of our support for >> the virtually/thinly provisioned luns since they are getting close to >> being able to test with real devices. >> >> My quick summary is that we most of the work so far has been done >> without any real hardware to play with - in 2.6.29-rc3, I don't see any >> low level ATA or SCSI bits that turn requests tagged with REQ_DISCARD >> into the specific ATA or SCSI commands. Did I miss something & if not, >> do we have plans to push anything upstream soonish? > > Bearing in mind that I'm now three weeks behind on email, you might want > to look at > http://git.kernel.org/?p=linux/kernel/git/willy/ssd.git;a=shortlog;h=trim-20081231 > which has at least one known bug (fixed by Dave Woodhouse and Ben > Herrenschmidt). I'll be able to give a more coherent answer in a few > days. Or maybe Dave will beat me to it ;-) Ben's suggestion was that the IDE core wouldn't be sending the payload of the command because it looks at the R/W bit... which is clear (read) in our discard requests ATM. Making them appear to be writes is simple enough though. I gave an updated test kernel to the Sandisk folks but haven't got results back from them yet. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
