kernel/linux.git/fs/ext4/move_extent.c, branch v6.1

ext4: factor out ext4_free_ext_path()

2022-10-01T03:46:54+00:00

Factor out ext4_free_ext_path() to free extent path. As after previous patch 'ext4_ext_drop_refs()' is only used in 'extents.c', so make it static. Signed-off-by: Ye Bin Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220924021211.3831551-3-yebin10@huawei.com Signed-off-by: Theodore Ts'o

ext4: remove unnecessary drop path references in mext_check_coverage()

2022-10-01T03:46:54+00:00

According to Jan Kara's suggestion: "The use in mext_check_coverage() can be actually removed - get_ext_path() -> ext4_find_extent() takes care of dropping the references." So remove unnecessary call ext4_ext_drop_refs() in mext_check_coverage(). Signed-off-by: Ye Bin Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220924021211.3831551-2-yebin10@huawei.com Signed-off-by: Theodore Ts'o

ext4: minor defrag code improvements

2022-09-27T20:48:57+00:00

Modify the error returns for two file types that can't be defragged to more clearly communicate those restrictions to a caller. When the defrag code is applied to swap files, return -ETXTBSY, and when applied to quota files, return -EOPNOTSUPP. Move an extent tree search whose results are only occasionally required to the site always requiring them for improved efficiency. Address a few typos. Signed-off-by: Eric Whitney Link: https://lore.kernel.org/r/20220722163910.268564-1-enwlinux@gmail.com Signed-off-by: Theodore Ts'o

ext4: Convert ext4 to read_folio

2022-05-09T20:21:45+00:00

This is a "weak" conversion which converts straight back to using pages. A full conversion should be performed at some point, hopefully by someone familiar with the filesystem. Signed-off-by: Matthew Wilcox (Oracle)

fs: Remove aop flags parameter from grab_cache_page_write_begin()

2022-05-08T18:28:19+00:00

There are no more aop flags left, so remove the parameter. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig

ext4: Use scoped memory API in mext_page_double_lock()

2022-05-08T18:28:19+00:00

Replace use of AOP_FLAG_NOFS with calls to memalloc_nofs_save() and memalloc_nofs_restore(). Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Theodore Ts'o

ext4: remove redundant o_start statement

2022-01-10T18:25:56+00:00

The if will goto out of the loop, and until the end of the function execution, o_start will not be used again. The clang_analyzer complains as follows: fs/ext4/move_extent.c:635:5 warning: Value stored to 'o_start' is never read Reported-by: Zeal Robot Signed-off-by: luo penghao Link: https://lore.kernel.org/r/20211208075157.404535-1-luo.penghao@zte.com.cn Signed-off-by: Theodore Ts'o

ext4: use common helpers in all places reading metadata buffers

2020-10-18T14:37:14+00:00

Revome all open codes that read metadata buffers, switch to use ext4_read_bh_*() common helpers. Signed-off-by: zhangyi (F) Suggested-by: Jan Kara Link: https://lore.kernel.org/r/20200924073337.861472-4-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o

ext4: limit the length of per-inode prealloc list

2020-08-19T16:04:36+00:00

In the scenario of writing sparse files, the per-inode prealloc list may be very long, resulting in high overhead for ext4_mb_use_preallocated(). To circumvent this problem, we limit the maximum length of per-inode prealloc list to 512 and allow users to modify it. After patching, we observed that the sys ratio of cpu has dropped, and the system throughput has increased significantly. We created a process to write the sparse file, and the running time of the process on the fixed kernel was significantly reduced, as follows: Running time on unfixed kernel： [root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat real 0m2.051s user 0m0.008s sys 0m2.026s Running time on fixed kernel： [root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat real 0m0.471s user 0m0.004s sys 0m0.395s Signed-off-by: Chunguang Xu Link: https://lore.kernel.org/r/d7a98178-056b-6db5-6bce-4ead23f4a257@gmail.com Signed-off-by: Theodore Ts'o

ext4: save all error info in save_error_info() and drop ext4_set_errno()

2020-04-01T21:29:06+00:00

Using a separate function, ext4_set_errno() to set the errno is problematic because it doesn't do the right thing once s_last_error_errorcode is non-zero. It's also less racy to set all of the error information all at once. (Also, as a bonus, it shrinks code size slightly.) Link: https://lore.kernel.org/r/20200329020404.686965-1-tytso@mit.edu Fixes: 878520ac45f9 ("ext4: save the error code which triggered...") Signed-off-by: Theodore Ts'o