Messages in this thread Patch in this message | | | From | NeilBrown <> | Date | Tue, 24 Jan 2006 14:58:32 +1100 | Subject | [PATCH 003 of 5] md: Don't remove bitmap from md array when switching to read-only |
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While a read-only array doesn't not really need a bitmap, we should not remove the bitmap when switching an array to read-only because a/ There is no code to re-add the bitmap which switching to read-write, b/ There is insufficient locking - the bitmap could be accessed while it is being removed.
cc: Reuben Farrelly <reuben-lkml@reub.net> Signed-off-by: Neil Brown <neilb@suse.de>
### Diffstat output ./drivers/md/md.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)
diff ./drivers/md/md.c~current~ ./drivers/md/md.c --- ./drivers/md/md.c~current~ 2006-01-24 13:42:29.000000000 +1100 +++ ./drivers/md/md.c 2006-01-24 14:47:17.000000000 +1100 @@ -2690,14 +2690,6 @@ static int do_md_stop(mddev_t * mddev, i set_disk_ro(disk, 1); } - bitmap_destroy(mddev); - if (mddev->bitmap_file) { - atomic_set(&mddev->bitmap_file->f_dentry->d_inode->i_writecount, 1); - fput(mddev->bitmap_file); - mddev->bitmap_file = NULL; - } - mddev->bitmap_offset = 0; - /* * Free resources if final stop */ @@ -2707,6 +2699,14 @@ static int do_md_stop(mddev_t * mddev, i struct gendisk *disk; printk(KERN_INFO "md: %s stopped.\n", mdname(mddev)); + bitmap_destroy(mddev); + if (mddev->bitmap_file) { + atomic_set(&mddev->bitmap_file->f_dentry->d_inode->i_writecount, 1); + fput(mddev->bitmap_file); + mddev->bitmap_file = NULL; + } + mddev->bitmap_offset = 0; + ITERATE_RDEV(mddev,rdev,tmp) if (rdev->raid_disk >= 0) { char nm[20]; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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