diff options
| author | Tim Murray <timmurray@google.com> | 2022-01-07 12:48:44 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2022-01-24 17:40:04 -0800 |
| commit | e4544b63a7ee49e7fbebf35ece0a6acd3b9617ae (patch) | |
| tree | b55709d5753a19b8beacfcab1fe12dc8128435d7 /fs/f2fs/xattr.c | |
| parent | dd81e1c7d5fb126e5fbc5c9e334d7b3ec29a16a0 (diff) | |
| download | linux-e4544b63a7ee49e7fbebf35ece0a6acd3b9617ae.tar.bz2 | |
f2fs: move f2fs to use reader-unfair rwsems
f2fs rw_semaphores work better if writers can starve readers,
especially for the checkpoint thread, because writers are strictly
more important than reader threads. This prevents significant priority
inversion between low-priority readers that blocked while trying to
acquire the read lock and a second acquisition of the write lock that
might be blocking high priority work.
Signed-off-by: Tim Murray <timmurray@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/xattr.c')
| -rw-r--r-- | fs/f2fs/xattr.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index 8e5cd9c916ff..c76c15086e5f 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -525,10 +525,10 @@ int f2fs_getxattr(struct inode *inode, int index, const char *name, if (len > F2FS_NAME_LEN) return -ERANGE; - down_read(&F2FS_I(inode)->i_xattr_sem); + f2fs_down_read(&F2FS_I(inode)->i_xattr_sem); error = lookup_all_xattrs(inode, ipage, index, len, name, &entry, &base_addr, &base_size, &is_inline); - up_read(&F2FS_I(inode)->i_xattr_sem); + f2fs_up_read(&F2FS_I(inode)->i_xattr_sem); if (error) return error; @@ -562,9 +562,9 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) int error; size_t rest = buffer_size; - down_read(&F2FS_I(inode)->i_xattr_sem); + f2fs_down_read(&F2FS_I(inode)->i_xattr_sem); error = read_all_xattrs(inode, NULL, &base_addr); - up_read(&F2FS_I(inode)->i_xattr_sem); + f2fs_up_read(&F2FS_I(inode)->i_xattr_sem); if (error) return error; @@ -786,9 +786,9 @@ int f2fs_setxattr(struct inode *inode, int index, const char *name, f2fs_balance_fs(sbi, true); f2fs_lock_op(sbi); - down_write(&F2FS_I(inode)->i_xattr_sem); + f2fs_down_write(&F2FS_I(inode)->i_xattr_sem); err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags); - up_write(&F2FS_I(inode)->i_xattr_sem); + f2fs_up_write(&F2FS_I(inode)->i_xattr_sem); f2fs_unlock_op(sbi); f2fs_update_time(sbi, REQ_TIME); |