From e4544b63a7ee49e7fbebf35ece0a6acd3b9617ae Mon Sep 17 00:00:00 2001 From: Tim Murray Date: Fri, 7 Jan 2022 12:48:44 -0800 Subject: 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 Signed-off-by: Jaegeuk Kim --- fs/f2fs/inline.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/f2fs/inline.c') diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c index 4b5cefa3f90c..a578bf83b803 100644 --- a/fs/f2fs/inline.c +++ b/fs/f2fs/inline.c @@ -629,7 +629,7 @@ int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname, } if (inode) { - down_write(&F2FS_I(inode)->i_sem); + f2fs_down_write(&F2FS_I(inode)->i_sem); page = f2fs_init_inode_metadata(inode, dir, fname, ipage); if (IS_ERR(page)) { err = PTR_ERR(page); @@ -658,7 +658,7 @@ int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname, f2fs_update_parent_metadata(dir, inode, 0); fail: if (inode) - up_write(&F2FS_I(inode)->i_sem); + f2fs_up_write(&F2FS_I(inode)->i_sem); out: f2fs_put_page(ipage, 1); return err; -- cgit v1.2.3