- 06 11月, 2011 2 次提交
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由 Chris Mason 提交于
The new ioctls to follow backrefs are not clean for 32/64 bit compat. This reworks them for u64s everywhere. They are brand new, so there are no problems with changing the interface now. Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 David Sterba 提交于
fs_info has now ~9kb, more than fits into one page. This will cause mount failure when memory is too fragmented. Top space consumers are super block structures super_copy and super_for_commit, ~2.8kb each. Allocate them dynamically. fs_info will be ~3.5kb. (measured on x86_64) Add a wrapper for freeing fs_info and all of it's dynamically allocated members. Signed-off-by: NDavid Sterba <dsterba@suse.cz>
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- 02 10月, 2011 1 次提交
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由 Arne Jansen 提交于
Scrub uses a simple tree-enumeration to bring the relevant portions of the extent- and csum-tree into the page cache before starting the scrub-I/O. This is now replaced by using the new readahead-API. During readahead the scrub is being accounted as paused, so it won't hold off transaction commits. This change raises the average disk bandwith utilisation on my test volume from 70% to 90%. On another volume, the time for a test run went down from 89s to 43s. Changes v5: - reada1/2 are now of type struct reada_control * Signed-off-by: NArne Jansen <sensille@gmx.net>
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- 29 9月, 2011 7 次提交
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由 Jan Schmidt 提交于
This ties nodatasum fixup in scrub together with raid repair patches. While both series are working fine alone, scrub will report uncorrectable errors if they occur in a nodatasum extent *and* the page is in the page cache. Previously, we would have triggered readpage to find good data and do the repair. However, readpage wouldn't read anything in the case where the page is up to date in the cache. So, we simply take that good data we have and call repair_io_failure directly (unless the page in the cache is dirty). Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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由 Jan Schmidt 提交于
btrfs_bio is a bio abstraction able to split and not complete after the last bio has returned (like the old btrfs_multi_bio). Additionally, btrfs_bio tracks the mirror_num used to read data which can be used for error correction purposes. Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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由 Jan Schmidt 提交于
This removes a FIXME comment and introduces the first part of nodatasum fixup: It gets the corresponding inode for a logical address and triggers a regular readpage for the corrupted sector. Once we have on-the-fly error correction our error will be automatically corrected. The correction code is expected to clear the newly introduced EXTENT_DAMAGED flag, making scrub report that error as "corrected" instead of "uncorrectable" eventually. Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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由 Jan Schmidt 提交于
the rest of the code uses int mirror_num, and so should scrub Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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由 Jan Schmidt 提交于
Fix the mirror_num determination in scrub_stripe. The rest of the scrub code did not use mirror_num for anything important and that error went unnoticed. The nodatasum fixup patch of this set depends on a correct mirror_num. Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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由 Jan Schmidt 提交于
While scrubbing, we may encounter various errors. Previously, a logical address was printed to the log only. Now, all paths belonging to that address are resolved and printed separately. That should work for hardlinks as well as reflinks. Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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由 Jan Schmidt 提交于
In normal operation, scrub is reading data sequentially in large portions. In case of an i/o error, we try to find the corrupted area(s) by issuing page sized read requests. With this commit we increment the unverified_errors counter if all of the small size requests succeed. Userland patches carrying such conspicous events to the administrator should already be around. Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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- 10 6月, 2011 3 次提交
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由 Arne Jansen 提交于
Signed-off-by: NArne Jansen <sensille@gmx.net>
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由 Arne Jansen 提交于
Scrub starts the workers each time a scrub starts and stops them after it finished. This patch adds an initialization for the workers before each start, otherwise the workers behave strangely. Signed-off-by: NArne Jansen <sensille@gmx.net>
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由 Arne Jansen 提交于
due to the semantics of btrfs_search_slot the path can point to an invalid slot when ret > 0. This condition went unnoticed, which in turn could have led to an incomplete scrubbing. Signed-off-by: NArne Jansen <sensille@gmx.net>
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- 04 6月, 2011 3 次提交
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由 David Sterba 提交于
wrap checking of filesystem 'closing' flag and fix a few missing memory barriers. Signed-off-by: NDavid Sterba <dsterba@suse.cz>
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由 Arne Jansen 提交于
With the removal of the implicit plugging scrub ends up doing more and smaller I/O than necessary. This patch adds explicit plugging per chunk. Signed-off-by: NArne Jansen <sensille@gmx.net> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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由 Arne Jansen 提交于
The current scrub implementation reuses bios and pages as often as possible, allocating them only on start and releasing them when finished. This leads to more problems with the block layer than it's worth. The elevator gets confused when there are more pages added to the bio than bi_size suggests. This patch completely rips out the reuse of bios and pages and allocates them freshly for each submit. Signed-off-by: NArne Jansen <sensille@gmx.net> Signed-off-by: NChris Maosn <chris.mason@oracle.com>
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- 27 5月, 2011 1 次提交
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由 Arne Jansen 提交于
scrub_page collects several pages into one bio as long as they are physically contiguous. As we only save one logical address for the whole bio, don't collect pages that are physically contiguous but logically discontiguous. Signed-off-by: NArne Jansen <sensille@gmx.net> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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- 12 5月, 2011 3 次提交
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由 Arne Jansen 提交于
setting the readonly flag prevents writes in case an error is detected Signed-off-by: NArne Jansen <sensille@gmx.net>
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由 Ilya Dryomov 提交于
btrfs scrub - make fixups sync, don't reuse fixup bios Fixups are already sync for csum failures, this patch makes them sync for EIO case as well. Fixups are now sharing pages with the parent sbio - instead of allocating a separate page to do a fixup we grab the page from the sbio buffer. Fixup bios are no longer reused. struct fixup is no longer needed, instead pass [sbio pointer, index]. Originally this was added to look at the possibility of sharing the code between drive swap and scrub, but it actually fixes a serious bug in scrub code where errors that could be corrected were ignored and reported as uncorrectable. btrfs scrub - restore bios properly after media errors The current code reallocates a bio after a media error. This is a temporary measure introduced in v3 after a serious problem related to bio reuse was found in v2 of scrub patchset. Basically we did not reset bv_offset and bv_len fields of the bio_vec structure. They are changed in case I/O error happens, for example, at offset 512 or 1024 into the page. Also bi_flags field wasn't properly setup before reusing the bio. Signed-off-by: NArne Jansen <sensille@gmx.net>
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由 Arne Jansen 提交于
This adds an initial implementation for scrub. It works quite straightforward. The usermode issues an ioctl for each device in the fs. For each device, it enumerates the allocated device chunks. For each chunk, the contained extents are enumerated and the data checksums fetched. The extents are read sequentially and the checksums verified. If an error occurs (checksum or EIO), a good copy is searched for. If one is found, the bad copy will be rewritten. All enumerations happen from the commit roots. During a transaction commit, the scrubs get paused and afterwards continue from the new roots. This commit is based on the series originally posted to linux-btrfs with some improvements that resulted from comments from David Sterba, Ilya Dryomov and Jan Schmidt. Signed-off-by: NArne Jansen <sensille@gmx.net>
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