- 11 Jul, 2008 28 commits
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Mingming Cao authored
Delayed allocation need to check free blocks at every write time. percpu_counter_read_positive() is not quit accurate. delayed allocation need a more accurate accounting, but using percpu_counter_sum_positive() is frequently is quite expensive. This patch added a new function to update center counter when sum per-cpu counter, to increase the accurate rate for next percpu_counter_read() and require less calling expensive percpu_counter_sum(). Signed-off-by:
Mingming Cao <cmm@us.ibm.com> Signed-off-by:
"Theodore Ts'o" <tytso@mit.edu>
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Alex Tomas authored
Updated with fixes from Mingming Cao <cmm@us.ibm.com> to unlock and release the page from page cache if the delalloc write_begin failed, and properly handle preallocated blocks. Also added a fix to clear buffer_delay in block_write_full_page() after allocating a delayed buffer. Updated with fixes from Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> to update i_disksize properly and to add bmap support for delayed allocation. Updated with a fix from Valerie Clement <valerie.clement@bull.net> to avoid filesystem corruption when the filesystem is mounted with the delalloc option and blocksize < pagesize. Signed-off-by:
Alex Tomas <alex@clusterfs.com> Signed-off-by:
Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by:
Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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Alex Tomas authored
Export mpage_bio_submit() and __mpage_writepage() for the benefit of ext4's delayed allocation support. Also change __block_write_full_page so that if buffers that have the BH_Delay flag set it will call get_block() to get the physical block allocated, just as in the !BH_Mapped case. Signed-off-by:
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Jan Kara authored
Signed-off-by:Jan Kara <jack@suse.cz>
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Jan Kara authored
This patch makes ext4 use inode-based implementation of data=ordered mode in JBD2. It allows us to unify some data=ordered and data=writeback paths (especially writepage since we don't have to start a transaction anymore) and remove some buffer walking. Updated fix from Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> to fix file system hang due to corrupt jinode values. Signed-off-by:
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Jan Kara authored
This patch adds necessary framework into JBD2 to be able to track inodes with each transaction and write-out their dirty data during transaction commit time. This new ordered mode brings all sorts of advantages such as possibility to get rid of journal heads and buffer heads for data buffers in ordered mode, better ordering of writes on transaction commit, simplification of some JBD code, no more anonymous pages when truncate of data being committed happens. Also with this new ordered mode, delayed allocation on ordered mode is much simpler. Signed-off-by: -
Jan Kara authored
Make filemap_fdatawrite_range() function public, so that it can later be used in ordered mode rewrite by JBD/JBD2. Signed-off-by: -
Jan Kara authored
We cannot call ext4_orphan_add() from under i_data_sem because that causes a lock ordering violation between i_data_sem and and the superblock lock. Updated with Aneesh's locking order fix Signed-off-by:
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Jan Kara authored
This changes are needed to support data=ordered mode handling via inodes. This enables us to get rid of the journal heads and buffer heads for data buffers in the ordered mode. With the changes, during tranasaction commit we writeout the inode pages using the writepages()/writepage(). That implies we take page lock during transaction commit. This can cause a deadlock with the locking order page_lock -> jbd2_journal_start, since the jbd2_journal_start can wait for the journal_commit to happen and the journal_commit now needs to take the page lock. To avoid this dead lock reverse the locking order. Signed-off-by:
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Jan Kara authored
There's no need to call mark_inode_dirty() under page lock in generic_write_end(). It unnecessarily makes hold time of page lock longer and more importantly it forces locking order of page lock and transaction start for journaling filesystems. Signed-off-by:
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Aneesh Kumar K.V authored
We would like to get notified when we are doing a write on mmap section. This is needed with respect to preallocated area. We split the preallocated area into initialzed extent and uninitialzed extent in the call back. This let us handle ENOSPC better. Otherwise we get ENOSPC in the writepage and that would result in data loss. The changes are also needed to handle ENOSPC when writing to an mmap section of files with holes. Acked-by:
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Jose R. Santos authored
Some of the information in Documentation/filesystems/ext4.txt is out of date and in need of an update. Signed-off-by:
Jose R. Santos <jrs@us.ibm.com> Signed-off-by:
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Frederic Bohe authored
Update group infos when updating a group's descriptor. Add group infos when adding a group's descriptor. Refresh cache pages used by mb_alloc when changes occur. This will probably need modifications when META_BG resizing will be allowed. Signed-off-by:
Frederic Bohe <frederic.bohe@bull.net> Signed-off-by:
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Eric Sandeen authored
Use the BUFFER_FNS functions (set_buffer_foo) to set buffer head state atomically instead of nonatomic __set_bit(). Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Signed-off-by:
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Jan Kara authored
Set sbi->s_journal to NULL after we call journal_destroy(). This will be later needed because after journal_destroy() is called, ext4_clear_inode() can still be called for some inodes (e.g. root inode) and we'll need to detect there that journal doesn't exists anymore. Signed-off-by:
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Mingming Cao authored
mballoc allocation missed check for blocks reserved for root users. Add ext4_has_free_blocks() check before allocation. Also modified ext4_has_free_blocks() to support multiple block allocation request. Signed-off-by:
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Eric Sandeen authored
To ensure that bits are truly on-disk after an fsync, we should call blkdev_issue_flush if barriers are supported. Inspired by an old thread on barriers, by reiserfs & xfs which do the same, and by a patch SuSE ships with their kernel Signed-off-by:
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Aneesh Kumar K.V authored
Move the code related to block allocation to a single function and add helper funtions to differient allocation for data and meta data blocks Signed-off-by:
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Aneesh Kumar K.V authored
When mballoc is enabled, block allocation for old block-based files are allocated using mballoc allocator instead of old block-based allocator. The old ext3 block reservation is turned off when mballoc is turned on. However, the in-core preallocation is not enabled for block-based/ non-extent based file block allocation. This result in performance regression, as now we don't have "reservation" ore in-core preallocation to prevent interleaved fragmentation in multiple writes workload. This patch fix this by enable per inode in-core preallocation for non extent files when mballoc is used. Signed-off-by:
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Akinobu Mita authored
When meta_bg feature is enabled and s_first_meta_bg != 0, ext4_init_block_bitmap() miscalculates the number of block used by the group descriptor table (0 or 1 for metablock block group) This patch fixes this by using ext4_bg_num_gdb() Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Stephen Tweedie <sct@redhat.com> Signed-off-by:
Andreas Dilger <adilger@sun.com>
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Aneesh Kumar K.V authored
Signed-off-by:
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Li Zefan authored
dx_root_limit() will had some dead code which forced it to always return 20, and dx_node_limit to always return 22 for debugging purposes. Remove it. Acked-by:
Li Zefan <lizf@cn.fujitsu.com> Signed-off-by:
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Shen Feng authored
Fix ext4_ext_journal_restart() so it returns any errors reported by ext4_journal_extend() and ext4_journal_restart(). Signed-off-by:
Shen Feng <shen@cn.fujitsu.com> Reviewed-by:
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Shen Feng authored
When pos=0 or depth, the fields of ext4_ext_path is are not completely filled. This patch also removes some unnecessary code. Signed-off-by:
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Shen Feng authored
ext4_ext_create_new_leaf must return error when its calling to ext4_ext_split failed. Signed-off-by:
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Aneesh Kumar K.V authored
When allocating unitialized space at the end of file which had been preallocated with the FALLOC_FL_KEEP_SIZE option, the file size is not updated at that time. But the later we are not updating the file size when writing to that preallocated space. These changes are for code correctness. This patch allows us to update the i_disksize at the write_end() callback of filesystem properly. Signed-off-by:
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Shen Feng authored
Quota allocation is not removed when ext4_mb_new_blocks calls kmem_cache_alloc failed. Also make sure the allocation context is freed on the error path. Signed-off-by:
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Li Zefan authored
The previous sb_min_blocksize() has already set the block size. Signed-off-by:
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- 14 Jul, 2008 1 commit
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Mingming Cao authored
journal_try_to_free_buffers() could race with jbd commit transaction when the later is holding the buffer reference while waiting for the data buffer to flush to disk. If the caller of journal_try_to_free_buffers() request tries hard to release the buffers, it will treat the failure as error and return back to the caller. We have seen the directo IO failed due to this race. Some of the caller of releasepage() also expecting the buffer to be dropped when passed with GFP_KERNEL mask to the releasepage()->journal_try_to_free_buffers(). With this patch, if the caller is passing the GFP_KERNEL to indicating this call could wait, in case of try_to_free_buffers() failed, let's waiting for journal_commit_transaction() to finish commit the current committing transaction , then try to free those buffers again with journal locked. Signed-off-by:
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- 11 Jul, 2008 2 commits
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Jose R. Santos authored
This patch mostly controls the way inode are allocated in order to make ialloc aware of flex_bg block group grouping. It achieves this by bypassing the Orlov allocator when block group meta-data are packed toghether through mke2fs. Since the impact on the block allocator is minimal, this patch should have little or no effect on other block allocation algorithms. By controlling the inode allocation, it can basically control where the initial search for new block begins and thus indirectly manipulate the block allocator. This allocator favors data and meta-data locality so the disk will gradually be filled from block group zero upward. This helps improve performance by reducing seek time. Since the group of inode tables within one flex_bg are treated as one giant inode table, uninitialized block groups would not need to partially initialize as many inode table as with Orlov which would help fsck time as the filesystem usage goes up. Signed-off-by:
Valerie Clement <valerie.clement@bull.net> Signed-off-by:
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Theodore Ts'o authored
Carlo Wood has demonstrated that it's possible to recover deleted files from the journal. Something that will make this easier is if we can put the time of the commit into commit block. Signed-off-by:
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- 14 Jul, 2008 3 commits
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Stoyan Gaydarov authored
__FUNCTION__ is gcc-specific, use __func__ instead Signed-off-by:
Stoyan Gaydarov <stoyboyker@gmail.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Mingming Cao <cmm@us.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Shen Feng authored
The error processing of the return value of mb_free_blocks is meanless because it only returns 0. This fix includes - make mb_free_blocks return void - remove the error processing part in callers - unlock group before calling ext4_error in mb_free_blocks Signed-off-by:
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Shen Feng authored
When the directory fs/ext4 is not correctly created under proc, the entry under this directory should not be created. Signed-off-by:
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- 11 Jul, 2008 6 commits
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Li Zefan authored
ext4_next_entry() is used by the debugging function dx_show_leaf(), so it must be defined before that function. Signed-off-by:
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Theodore Ts'o authored
Signed-off-by: -
Theodore Ts'o authored
Since this a non-static function, make it be ext4 specific to avoid conflicts with potentially other filesystems. Signed-off-by: -
Shen Feng authored
remove the definitions of macros XATTR_TRUSTED_PREFIX and XATTR_USER_PREFIX since they are defined in linux/xattr.h Signed-off-by:
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Shen Feng authored
ext4_mb_seq_history_open(): check if sbi->s_mb_history is NULL ext4_mb_history_init(): replace kmalloc and memset with kzalloc ext4_mb_init_backend(): remove memset since kzalloc is used ext4_mb_init(): the return value of ext4_mb_init_backend is int, but i is unsigned, replace it with a new int variable. Signed-off-by:
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Shen Feng authored
Add error processing for ext4_mb_load_buddy when it calls ext4_mb_init_cache. Signed-off-by:
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