Ted, > On Fri, Nov 07, 2008 at 01:41:35PM -0500, Ric Wheeler wrote: > >> Will we be able to query the device and find out its TRIM/UNMAP > >> alignment requirements? There is also a balance between performance > >> (at least if the concern is sending too many separate TRIM commands) > >> and giving the SSD more flexibility in its wear-leveling allocation > >> decisions by sending TRIM commands sooner rather than later. > >> > > T10 is still working on the proposal for how to display unmap related > > information for SCSI, so we don't even have a consistent way to find > > this out today for this population. > > Yeah, I know, the rhetorical question was mostly addressed at David > Black. :-) Well, here's a real answer ... that should be coming in T10/08-149r5 as an addition to the block device limits VPD page. Sorry for the delay - I probably ought to remind Ric not to start this sort of discussion *during* the T10 meetings - in contrast to the kernel, my brain is far less effective at multi-tasking ;-). FYI, --David -- 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
