search for: btrfs_header_generation

I''ve been working to try to improve the write-ahead log''s performance, and I found that the bottleneck addresses in the checksum items, especially when we want to make a random write on a large file, e.g a 4G file. Then a idea for this suggested by Chris is to use sub transaction ids and just to log the part of inode that had changed since either the last log commit or the last

...&disk_key, 0); + cow = btrfs_alloc_free_block(trans, new_root, buf->len, + new_root_objectid, &disk_key, level, buf->start, 0); if (IS_ERR(cow)) { kfree(new_root); @@ -117,7 +122,7 @@ int btrfs_copy_root(struct btrfs_trans_h BTRFS_FSID_SIZE); WARN_ON(btrfs_header_generation(buf) > trans->transid); - ret = btrfs_inc_ref(trans, new_root, buf, cow, NULL); + ret = btrfs_inc_ref(trans, new_root, cow, 0); kfree(new_root); if (ret) @@ -128,6 +133,74 @@ int btrfs_copy_root(struct btrfs_trans_h return 0; } +static noinline int __btrfs_update_ref(struct btrfs_t...

...t the orphan + * cleanup has been done and committed since we search the commit root, + * so check its commit root transid with our otransid and if they match + * commit the transaction to make sure everything is updated. + */ + down_read(&send_root->fs_info->extent_commit_sem); + if (btrfs_header_generation(send_root->commit_root) == + btrfs_root_otransid(&send_root->root_item)) { + struct btrfs_trans_handle *trans; + + up_read(&send_root->fs_info->extent_commit_sem); + + trans = btrfs_attach_transaction_barrier(send_root); + if (IS_ERR(trans)) { + if (PTR_ERR(trans) != -...

...t: Assertion `!(level == 0)'' failed. Aborted mount -o ro,recovery fails # mount -o ro,recovery /dev/sde /DATA mount: wrong fs type, bad option, bad superblock on /dev/sde, ... # btrfs-zero-log /dev/sde eventually fails with : btrfs-zero-log: ctree.c:342: __btrfs_cow_block: Assertion `!(btrfs_header_generation(buf) > trans->transid)'' failed. Aborted What should I try next? regards ronnie sahlberg -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordo...

...t;fd, + (unsigned long long)buf->dev_bytenr); + } free(result); return 1; } @@ -165,6 +181,31 @@ static int verify_parent_transid(struct extent_io_tree *io_tree, (unsigned long long)eb->start, (unsigned long long)parent_transid, (unsigned long long)btrfs_header_generation(eb)); + fprintf(stderr, "dd if=(fd %i) bs=1c skip=%llu count=8 | od -t x1:\n%02x %02x %02x %02x %02x %02x %02x %02x\n", + eb->fd, + (unsigned long long)eb->dev_bytenr + + offsetof (struct btrfs_header, generation), + (__u8)eb->data[offsetof (struct btrfs_header, generation)],...

...level = btrfs_header_level(buf); nritems = btrfs_header_nritems(buf); @@ -1114,7 +1124,7 @@ goto out; } - ref->root_gen = root->root_key.offset; + ref->root_gen = root_gen; ref->bytenr = buf->start; ref->owner = btrfs_header_owner(buf); ref->generation = btrfs_header_generation(buf); @@ -1143,8 +1153,7 @@ info++; } - BUG_ON(!root->ref_tree); - ret = btrfs_add_leaf_ref(root, ref); + ret = btrfs_add_leaf_ref(root, ref, shared); WARN_ON(ret); btrfs_free_leaf_ref(root, ref); } diff -r 47aa0c51998a ref-cache.c --- a/ref-cache.c Thu Sep 25 16:00:36 2008 +...

...fs_header_level(cached_eb); + p->nodes[level] = cached_eb; + p->locks[level] = root_lock; + + if (root->objectid == BTRFS_TREE_LOG_OBJECTID && + (btrfs_header_owner(cached_eb) != BTRFS_TREE_LOG_OBJECTID || + cached_eb->root_objectid != root->root_key.offset || + btrfs_header_generation(cached_eb) != trans->transid)) { + btrfs_release_path(p); + return -ERESTART; + } else if (root->objectid != cached_eb->root_objectid || + btrfs_header_owner(cached_eb) != root->objectid || + (cow && + btrfs_header_generation(cached_eb) != trans->transid)) { +...

...f (ref_root != root->root_key.objectid && + ref_root != BTRFS_TREE_LOG_OBJECTID) { + ret = 1; goto out; - - if (ref_count != 1) { + } + if (btrfs_ref_generation(leaf, ref_item) <= last_snapshot) { ret = 1; goto out; } - if (level >= 0) - ref_generation = btrfs_header_generation(eb); + + path->slots[0]++; } ret = 0; out: - if (path) - btrfs_free_path(path); + btrfs_free_path(path); return ret; } diff -urp 3/fs/btrfs/inode.c 4/fs/btrfs/inode.c --- 3/fs/btrfs/inode.c 2008-10-27 21:25:18.000000000 +0800 +++ 4/fs/btrfs/inode.c 2008-10-27 21:26:31.000000000 +0800...

This series introduces a generic readahead interface for btrfs trees. The intention is to use it to speed up scrub in a first run, but balance is another hot candidate. In general, every tree walk could be accompanied by a readahead. Deletion of large files comes to mind, where the fetching of the csums takes most of the time. Also the initial build-ups of free-space-caches and

Hi all - The following 9 patches add more error handling to the btrfs code: - Add btrfs_panic - Catch locking failures in {set,clear}_extent_bit - Push up set_extent_bit errors to callers - Push up lock_extent errors to callers - Push up clear_extent_bit errors to callers - Push up unlock_extent errors to callers - Make pin_down_extent return void - Push up btrfs_pin_extent errors to

...f5 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -355,7 +355,7 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS); ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, btrfs_header_generation(eb)); - BUG_ON(ret); + btrfs_fixable_bug_on(ret); found_start = btrfs_header_bytenr(eb); if (found_start != start) { WARN_ON(1); @@ -666,7 +666,7 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_inf...

This series introduces a generic readahead interface for btrfs trees. The intention is to use it to speed up scrub in a first run, but balance is another hot candidate. In general, every tree walk could be accompanied by a readahead. Deletion of large files comes to mind, where the fetching of the csums takes most of the time. Also the initial build-ups of free-space-caches and

Hi all - Here''s my current error handling patchset, against 3.1-rc8. Almost all of this patchset is preparing for actual error handling. Before we start in on that work, I''m trying to reduce the surface we need to worry about. It turns out that there is a ton of code that returns an error code but never actually reports an error. The patchset has grown to 65 patches. 46 of them

Hi, The following patches add support for ext4 and btrfs to PV-GRUB. These patches are taken nearly verbatim from those provided by Fedora and Gentoo. We''ve been using these patches for the PV-GRUB images available in EC2 for some time now with no problems. Changes from v1: - Makefile has been changed to check the exit code from patch - The btrfs patch has been rebased to apply

This is a first draft of a subvolume quota implementation. It is possible to limit subvolumes and any group of subvolumes and also to track the amount of space that will get freed when deleting snapshots. The current version is functionally incomplete, with the main missing feature being the initial scan and rescan of an existing filesystem. I put some effort into writing an introduction into