- 02 8月, 2011 17 次提交
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由 Li Zefan 提交于
rb_node returned by __tree_search() can be a valid pointer or NULL, but won't be some errno. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
When we search a dir item with a specific hash code, we can just return NULL without further checking if btrfs_search_slot() returns 1. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
So there's no overhead for something we don't use. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
Since commit f2a97a9d ("btrfs: remove all unused functions"), there's no extern functions at all in ref-cache.c, so just remove the remaining dead code. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
wait_for_commit() always returns 0. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
Use wait_event() when possible to avoid code duplication. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
If mounting with nodatasum option, we won't csum file data for general write or direct-io write, and this rule should also be applied when writing compressed files. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
Memory areas [ptr, ptr+total_len] and [name, name+total_len] may overlap, so it's wrong to use memcpy(). Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
In __btrfs_free_extent we will print the leaf if we fail to find the extent we wanted, but the problem is if we get an error we won't have a leaf so often this leads to a NULL pointer dereference and we lose the error that actually occurred. So only print the leaf if ret > 0, which means we didn't find the item we were looking for but we didn't error either. This way the error is preserved. Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Mark Fasheh 提交于
This is fairly trivial - btrfs_set_root_node() - always returns zero so we can just make it void. All callers ignore the return code now anyway. I also made sure to check that none of the functions that btrfs_set_root_node() calls returns an error that we might have needed to catch and pass back. Signed-off-by: NMark Fasheh <mfasheh@suse.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 liubo 提交于
Here I have a two SSD-partitions btrfs, and they are defaultly set to "data=raid0, metadata=raid1", then I try to fill my btrfs partition till "No space left on device", via "dd if=/dev/zero of=/mnt/btrfs/tmp". I get an oops panic from kernel BUG at fs/btrfs/extent-tree.c:5199!, which refers to find_free_extent's BUG_ON(index != get_block_group_index(block_group)); In SSD mode, in order to find enough space to alloc, we may check the block_group cache which has been checked sometime before, but the index is not updated, where it hits the BUG_ON. Signed-off-by: NLiu Bo <liubo2009@cn.fujitsu.com> Acked-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 WuBo 提交于
The access for ro in btrfs_block_group_cache should be protected because of the racy lock in relocation. Signed-off-by: NWu Bo <wu.bo@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Jeff Mahoney 提交于
The set/clear bit and the extent split/merge hooks only ever return 0. Changing them to return void simplifies the error handling cases later. This patch changes the hook prototypes, the single implementation of each, and the functions that call them to return void instead. Since all four of these hooks execute under a spinlock, they're necessarily simple. Signed-off-by: NJeff Mahoney <jeffm@suse.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Li Zefan 提交于
We passed the wrong value to btrfs_force_ra(). Fix this by changing the argument of btrfs_force_ra() from last_index to nr_page. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Tsutomu Itoh 提交于
When btrfs_unlink_inode() and btrfs_orphan_add() in btrfs_unlink() are error, the error code is returned to the caller instead of BUG_ON(). Signed-off-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Wanlong Gao 提交于
Don't need to check the return value of __btrfs_add_inode_defrag(), since it will always return 0. Signed-off-by: NWanlong Gao <gaowanlong@cn.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Merge branch 'alloc_path' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/btrfs-error-handling into for-linus
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- 28 7月, 2011 15 次提交
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由 Chris Mason 提交于
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由 Chris Mason 提交于
The btrfs transaction code will return any errors that come from reserve_metadata_bytes. We need to make sure we don't return funny things like 1 or EAGAIN. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Now that we are using regular file crcs for the free space cache, we can deadlock if we try to read the free_space_inode while we are updating the crc tree. This commit fixes things by using the commit_root to read the crcs. This is safe because we the free space cache file would already be loaded if that block group had been changed in the current transaction. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
For metadata buffers that don't straddle pages (all of them), btrfs can safely use the page uptodate bits and extent_buffer uptodate bit instead of needing to use the extent_state tree. This greatly reduces contention on the state tree lock. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
Before the reader/writer locks, btrfs_next_leaf needed to keep the path blocking to avoid making lockdep upset. Now that btrfs_next_leaf only takes read locks, this isn't required. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
This patch was originally from Tejun Heo. lockdep complains about the btrfs locking because we sometimes take btree locks from two different trees at the same time. The current classes are based only on level in the btree, which isn't enough information for lockdep to figure out if the lock is safe. This patch makes a class for each type of tree, and lumps all the FS trees that actually have files and directories into the same class. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
The btrfs metadata btree is the source of significant lock contention, especially in the root node. This commit changes our locking to use a reader/writer lock. The lock is built on top of rw spinlocks, and it extends the lock tracking to remember if we have a read lock or a write lock when we go to blocking. Atomics count the number of blocking readers or writers at any given time. It removes all of the adaptive spinning from the old code and uses only the spinning/blocking hints inside of btrfs to decide when it should continue spinning. In read heavy workloads this is dramatically faster. In write heavy workloads we're still faster because of less contention on the root node lock. We suffer slightly in dbench because we schedule more often during write locks, but all other benchmarks so far are improved. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
Hit this nice little deadlock. What happens is this __btrfs_end_transaction with throttle set, --use_count so it equals 0 btrfs_commit_transaction <somebody else actually manages to start the commit> btrfs_end_transaction --use_count so now its -1 <== BAD we just return and wait on the transaction This is bad because we just return after our use_count is -1 and don't let go of our num_writer count on the transaction, so the guy committing the transaction just sits there forever. Fix this by inc'ing our use_count if we're going to call commit_transaction so that if we call btrfs_end_transaction it's valid. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Chris Mason 提交于
The extent_buffers have a very complex interface where we use HIGHMEM for metadata and try to cache a kmap mapping to access the memory. The next commit adds reader/writer locks, and concurrent use of this kmap cache would make it even more complex. This commit drops the ability to use HIGHMEM with extent buffers, and rips out all of the related code. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Miao Xie 提交于
When we balanced the chunks across the devices, BUG_ON() in __finish_chunk_alloc() was triggered. ------------[ cut here ]------------ kernel BUG at fs/btrfs/volumes.c:2568! [SNIP] Call Trace: [<ffffffffa049525e>] btrfs_alloc_chunk+0x8e/0xa0 [btrfs] [<ffffffffa04546b0>] do_chunk_alloc+0x330/0x3a0 [btrfs] [<ffffffffa045c654>] btrfs_reserve_extent+0xb4/0x1f0 [btrfs] [<ffffffffa045c86b>] btrfs_alloc_free_block+0xdb/0x350 [btrfs] [<ffffffffa048a8d8>] ? read_extent_buffer+0xd8/0x1d0 [btrfs] [<ffffffffa04476fd>] __btrfs_cow_block+0x14d/0x5e0 [btrfs] [<ffffffffa044660d>] ? read_block_for_search+0x14d/0x4d0 [btrfs] [<ffffffffa0447c9b>] btrfs_cow_block+0x10b/0x240 [btrfs] [<ffffffffa044dd5e>] btrfs_search_slot+0x49e/0x7a0 [btrfs] [<ffffffffa044f07d>] btrfs_insert_empty_items+0x8d/0xf0 [btrfs] [<ffffffffa045e973>] insert_with_overflow+0x43/0x110 [btrfs] [<ffffffffa045eb0d>] btrfs_insert_dir_item+0xcd/0x1f0 [btrfs] [<ffffffffa0489bd0>] ? map_extent_buffer+0xb0/0xc0 [btrfs] [<ffffffff812276ad>] ? rb_insert_color+0x9d/0x160 [<ffffffffa046cc40>] ? inode_tree_add+0xf0/0x150 [btrfs] [<ffffffffa0474801>] btrfs_add_link+0xc1/0x1c0 [btrfs] [<ffffffff811dacac>] ? security_inode_init_security+0x1c/0x30 [<ffffffffa04a28aa>] ? btrfs_init_acl+0x4a/0x180 [btrfs] [<ffffffffa047492f>] btrfs_add_nondir+0x2f/0x70 [btrfs] [<ffffffffa046af16>] ? btrfs_init_inode_security+0x46/0x60 [btrfs] [<ffffffffa0474ac0>] btrfs_create+0x150/0x1d0 [btrfs] [<ffffffff81159c63>] ? generic_permission+0x23/0xb0 [<ffffffff8115b415>] vfs_create+0xa5/0xc0 [<ffffffff8115ce6e>] do_last+0x5fe/0x880 [<ffffffff8115dc0d>] path_openat+0xcd/0x3d0 [<ffffffff8115e029>] do_filp_open+0x49/0xa0 [<ffffffff8116a965>] ? alloc_fd+0x95/0x160 [<ffffffff8114f0c7>] do_sys_open+0x107/0x1e0 [<ffffffff810bcc3f>] ? audit_syscall_entry+0x1bf/0x1f0 [<ffffffff8114f1e0>] sys_open+0x20/0x30 [<ffffffff81484ec2>] system_call_fastpath+0x16/0x1b [SNIP] RIP [<ffffffffa049444a>] __finish_chunk_alloc+0x20a/0x220 [btrfs] The reason is: Task1 Space balance task do_chunk_alloc() __finish_chunk_alloc() update device info in the chunk tree alloc system metadata block relocate system metadata block group set system metadata block group readonly, This block group is the only one that can allocate space. So there is no free space that can be allocated now. find no space and don't try to alloc new chunk, and then return ENOSPC BUG_ON() in __finish_chunk_alloc() was triggered. Fix this bug by allocating a new system metadata chunk before relocating the old one if we find there is no free space which can be allocated after setting the old block group to be read-only. Reported-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com> Tested-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
Everybody else does this, we need to do it too. If we're syncing, we need to tag the pages we're going to write for writeback so we don't end up writing the same stuff over and over again if somebody is constantly redirtying our file. This will keep us from having latencies with heavy sync workloads. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
So I had this brilliant idea to use atomic counters for outstanding and reserved extents, but this turned out to be a bad idea. Consider this where we have 1 outstanding extent and 1 reserved extent Reserver Releaser atomic_dec(outstanding) now 0 atomic_read(outstanding)+1 get 1 atomic_read(reserved) get 1 don't actually reserve anything because they are the same atomic_cmpxchg(reserved, 1, 0) atomic_inc(outstanding) atomic_add(0, reserved) free reserved space for 1 extent Then the reserver now has no actual space reserved for it, and when it goes to finish the ordered IO it won't have enough space to do it's allocation and you get those lovely warnings. Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
Kill the check to see if we have 512mb of reserved space in delalloc and shrink_delalloc if we do. This causes unexpected latencies and we have other logic to see if we need to throttle. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Josef Bacik 提交于
grab_cache_page will use mapping_gfp_mask(), which for all inodes is set to GFP_HIGHUSER_MOVABLE. So instead use find_or_create_page in all cases where we need GFP_NOFS so we don't deadlock. Thanks, Signed-off-by: NJosef Bacik <josef@redhat.com>
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由 Josef Bacik 提交于
A user reported a deadlock when copying a bunch of files. This is because they were low on memory and kthreadd got hung up trying to migrate pages for an allocation when starting the caching kthread. The page was locked by the person starting the caching kthread. To fix this we just need to use the async thread stuff so that the threads are already created and we don't have to worry about deadlocks. Thanks, Reported-by: NRoman Mamedov <rm@romanrm.ru> Signed-off-by: NJosef Bacik <josef@redhat.com>
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- 26 7月, 2011 2 次提交
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由 Mark Fasheh 提交于
In addition to properly handling allocation failure from btrfs_alloc_path, I also fixed up the kzalloc error handling code immediately below it. Signed-off-by: NMark Fasheh <mfasheh@suse.com>
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由 Mark Fasheh 提交于
I also removed the BUG_ON from error return of find_next_chunk in init_first_rw_device(). It turns out that the only caller of init_first_rw_device() also BUGS on any nonzero return so no actual behavior change has occurred here. do_chunk_alloc() also needed an update since it calls btrfs_alloc_chunk() which can now return -ENOMEM. Instead of setting space_info->full on any error from btrfs_alloc_chunk() I catch and return every error value _except_ -ENOSPC. Thanks goes to Tsutomu Itoh for pointing that issue out. Signed-off-by: NMark Fasheh <mfasheh@suse.com>
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- 22 7月, 2011 6 次提交
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由 Linus Torvalds 提交于
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git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb由 Linus Torvalds 提交于
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: sparc,kgdbts: fix compile regression with kgdb test suite
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由 Jason Wessel 提交于
Commit 63ab25eb (kgdbts: unify/generalize gdb breakpoint adjustment) introduced a compile regression on sparc. kgdbts.c: In function 'check_and_rewind_pc': kgdbts.c:307: error: implicit declaration of function 'instruction_pointer_set' Simply add the correct macro definition for instruction pointer on the Sparc architecture. Signed-off-by: NJason Wessel <jason.wessel@windriver.com> Acked-by: NMike Frysinger <vapier@gentoo.org> Acked-by: NDavid S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: CIFS: Fix wrong length in cifs_iovec_read
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由 Linus Torvalds 提交于
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Make Dell Latitude E6420 use reboot=pci x86: Make Dell Latitude E5420 use reboot=pci
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由 H. Peter Anvin 提交于
Yet another variant of the Dell Latitude series which requires reboot=pci. From the E5420 bug report by Daniel J Blueman: > The E6420 is affected also (same platform, different casing and > features), which provides an external confirmation of the issue; I can > submit a patch for that later or include it if you prefer: > http://linux.koolsolutions.com/2009/08/04/howto-fix-linux-hangfreeze-during-reboots-and-restarts/Reported-by: NDaniel J Blueman <daniel.blueman@gmail.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com> Cc: <stable@kernel.org>
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