On Tue, 4 Jan 2011 17:51:17 +0100 Andrea Gelmini <andrea.gelmini@xxxxxxxxx> wrote: > Hi all, > and thanks a lot for your effort on MdAdm. > With latest git version of mdadm tools I have > problems with creation of internal bitmap. Doing something like this: > ./mdadm -Ss;./mdadm --create /dev/md0 --level=1 --raid-devices=2 > --assume-clean --bitmap=internal /dev/sdb5 missing --auto=md -e > 1.2;cat /proc/mdstat > mdadm: stopped /dev/md0 > mdadm: /dev/sdb5 appears to be part of a raid array: > level=raid1 devices=2 ctime=Tue Jan 4 17:29:06 2011 > Continue creating array? y > mdadm: array /dev/md0 started. > Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] > md0 : active raid1 sdb5[0] > 55777208 blocks super 1.2 [2/1] [U_] > bitmap: 1/1 pages [4KB], 65536KB chunk > > I always have 1/1 pages (also with different partition sizes: 1G > as 80G, no differences). Why do you think that this is a problem??? NeilBrown > > I bisected (because official Ubuntu 10.10 MdAdm work well), and > I've got this: > > b8ab2a50aba72c7316d92d0fb414167844673136 is the first bad commit > commit b8ab2a50aba72c7316d92d0fb414167844673136 > Author: NeilBrown <neilb@xxxxxxx> > Date: Tue Nov 17 13:15:34 2009 +1100 > > Set default bitmap-chunksize for internal bitmaps to at least 64Meg > > A small bitmap-chunksize hurts performance without helping > resync speed much - particularly on internal bitmaps. > > So set the default to at least 64Meg. > > Signed-off-by: NeilBrown <neilb@xxxxxxx> > > :100644 100644 fb20383a2af65b778da3653ff1b14cbd32cbe320 > 3b6ffa041b0f83f0dcd95e455194d0bc7c249602 M mdadm.8 > :100644 100644 f9e6a6db262135476cfed766f15bd0f4ec360847 > 955e832dbb977d432f4fbf90c619a2dbb171707d M super0.c > :100644 100644 a21e7e3baf8eeeeaf8b9f6a71ed6a833937e846e > 8678e9f421b9f45eebaf60849729acf471ad7039 M super1.c > :040000 040000 c38915f28a038db7bcf2a207f3b60731d5655bea > fb66f4f76ef1ff31a00aecd69c1232beee15d82e M tests > > Here the bisect log: > gelma@çå:/tmp/mdadm$ git bisect log > git bisect start > # bad: [a2973b6af235f993b3085cfb51bc50cc6ca38d38] segfault in imsm > create with wrong arguments > git bisect bad a2973b6af235f993b3085cfb51bc50cc6ca38d38 > # good: [c04bf2398e49763460c0e04df3130566ced16555] Release 2.6.7.1 > git bisect good c04bf2398e49763460c0e04df3130566ced16555 > # good: [866d136a2f75b751188dfdd490be4d64e6a14d09] Release 2.6.7 > git bisect good 866d136a2f75b751188dfdd490be4d64e6a14d09 > # good: [6c40598f598874d1d4c2c4d0da0c2a9b873d768d] Merge branch > 'master' into devel-3.0 > git bisect good 6c40598f598874d1d4c2c4d0da0c2a9b873d768d > # good: [4a997737a14f580e3addfa1db6be005c37e7c0f4] Merge branch > 'master' into devel-3.1 > git bisect good 4a997737a14f580e3addfa1db6be005c37e7c0f4 > # bad: [ed8fa52f31521b8314859f290c464f77359933a0] mdmon: check select > a writable pid_dir > git bisect bad ed8fa52f31521b8314859f290c464f77359933a0 > # skip: [dd9bb2fbed335f69225ea1a3514bd27422288a18] imsm: prune dead > code in validate_geometry_imsm > git bisect skip dd9bb2fbed335f69225ea1a3514bd27422288a18 > # bad: [c1e3ab8c1e76f4ae71ab23bcf5e8c2bf8bd3774e] Merge branch > 'master' of git://github.com/djbw/mdadm > git bisect bad c1e3ab8c1e76f4ae71ab23bcf5e8c2bf8bd3774e > # bad: [cd77ac4eafb0460ff6229e9a8dd732f2c4dd42c5] Assemble: fix > testing of 'verbose' flag. > git bisect bad cd77ac4eafb0460ff6229e9a8dd732f2c4dd42c5 > # good: [14e5b4d72b4db55e688581d98ec47131554f747c] Grow: data_offset > is in sectors, offsets[] is in bytes - convert > git bisect good 14e5b4d72b4db55e688581d98ec47131554f747c > # good: [7d5c3964ccfaace123f7b75e15d38c2650e013d8] Change default > metadata from 0.90 to 1.1 > git bisect good 7d5c3964ccfaace123f7b75e15d38c2650e013d8 > # bad: [b42f577a0dbe0b232600478f4a5068b2f63a2684] Improve error > messages when metadata handler does not support request. > git bisect bad b42f577a0dbe0b232600478f4a5068b2f63a2684 > # bad: [b8ab2a50aba72c7316d92d0fb414167844673136] Set default > bitmap-chunksize for internal bitmaps to at least 64Meg > git bisect bad b8ab2a50aba72c7316d92d0fb414167844673136 > # good: [ff94fb86fd22842c06e8fad08c27a4e365d7834a] Grow: various fixes > to recent breakages. > git bisect good ff94fb86fd22842c06e8fad08c27a4e365d7834a > > Thanks a lot for your work, > Andrea > > ----------------------------- >  git://neil.brown.name/mdadm a2973b6af235f993b3085cfb51bc50cc6ca38d38 -- 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
