On Wed, Apr 11, 2012 at 02:44:26PM +0000, Francesco Cepparo wrote: > Hi, I've been using btrfs for a while now, and some months ago one of > my filesystems stopped mounting. I tried to fix it by mounting it with > the recovery option, by using btrfs-zero-log and by restoring the > superblock but it didn't work, so I left the filesystem standing there > waiting for the fsck repairing tool to be released (running the > version of fsck I had at the time produced the following output: > http://dl.dropbox.com/u/2565562/btrfsck-old-output while running the > 2012-03-28 version of btrfsck produces the following output: > http://dl.dropbox.com/u/2565562/btrfsck-20120328-output.gz ). > I'm still waiting for the repairing tool and I haven't tried the > dangerous don't ever use branch, but as I have updated the kernel to > version 3.4.0-rc2 I tried to mount the filesystem again with the new > kernel, and instead of failing with this error message: > http://dl.dropbox.com/u/2565562/btrfs-kernel-3.3 as it did with kernel > 3.3.1 and the previous kernels, with 3.4.0-rc2 it now hits the > following kernel BUG: > http://dl.dropbox.com/u/2565562/btrfs-kernel-3.4-bug > > I hope I can be of any help in improving the already great btrfs. > Also, is there any hope for me to recover my old filesystem? :) Sorry, can you try this patch and see if it stops panicing, thanks, Josef diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 20196f4..2a3ddd2 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -383,17 +383,17 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root, if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) break; + num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, + eb->start, eb->len); + if (num_copies == 1) + break; + if (!failed_mirror) { failed = 1; printk(KERN_ERR "failed mirror was %d\n", eb->failed_mirror); failed_mirror = eb->failed_mirror; } - num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, - eb->start, eb->len); - if (num_copies == 1) - break; - mirror_num++; if (mirror_num == failed_mirror) mirror_num++; -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
