On Sun, 2012-05-27 at 09:34 +0200, Stefan Ring wrote: > >> [root@siFlash test]# xfs_bmap -vp 2.r.96.0 > >> xfs_bmap: xfsctl(XFS_IOC_GETBMAPX) iflags=0x4 ["2.r.96.0"]: Cannot allocate memory > > > > Try filefrag -v maybe, if your e2fsprogs is new enough. > > > > Trying to remember, ENOMEM in bmap rings a bell... but this is possibly indicative of an extremely fragmented file. > > True, I've had it happen with extremely fragmented files. > > I've started playing around with discard myself only recently, but so > far I like the approach of using fstrim a lot better than the discard > option: http://xfs.org/index.php/FITRIM/discard Check what blockdev --getra <md device> is set to. I used to have a several second deletes on large (4GB) fragmented files when ra was the default 256. Once I changed it to 4096 (best value will depend on your setup) the deletes became instant. K -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
