On Fri, Jan 18 2008, Linda Walsh wrote: > Jens Axboe wrote: > >On Fri, Jan 18 2008, Linda Walsh wrote: > > > >>I was examining the SuSE10.3 boot process and noted > >>it is setup to start & stop blktrace while the system > >>is booting. Odd think is that it checks to verify that > >>the root file system is of type "ext3". > >> > >>Is that a "SuSEism" or is there some reason why it wouldn't > >>work with any file system? > >> > > > >Interesting, I never noticed that before. Don't know why they check for > >ext3, perhaps their post processing tools map blocks to files and only > >works for ext3? > > > --- > Would be nice if they left a comment to that effect. > ext2 should be the same, and I think xfs has all the > data needed to process it under a perl script -- xfs_bmap, > for example, prints off all of the blocks used by a file (so > it's easy to compute fragmentation). > > They don't seem to include a util in the blktrace package > to map blocks to to files. Anyway, you answer my question -- > blktracing doesn't rely on something ext3 specific. There's definitely nothing fs specific in blktrace. IIRC, Olaf Kirch wrote something called fsmap while at SUSE. Perhaps that is a clue to what they are doing there? -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-btrace" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
