This is a note to let you know that I've just added the patch titled
f2fs: reduce expensive checkpoint trigger frequency
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
f2fs-reduce-expensive-checkpoint-trigger-frequency.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 704993499fc2af8d0af5dfd635d19990ed2f851b
Author: Chao Yu <chao@xxxxxxxxxx>
Date: Wed Jun 26 09:47:27 2024 +0800
f2fs: reduce expensive checkpoint trigger frequency
[ Upstream commit aaf8c0b9ae042494cb4585883b15c1332de77840 ]
We may trigger high frequent checkpoint for below case:
1. mkdir /mnt/dir1; set dir1 encrypted
2. touch /mnt/file1; fsync /mnt/file1
3. mkdir /mnt/dir2; set dir2 encrypted
4. touch /mnt/file2; fsync /mnt/file2
...
Although, newly created dir and file are not related, due to
commit bbf156f7afa7 ("f2fs: fix lost xattrs of directories"), we will
trigger checkpoint whenever fsync() comes after a new encrypted dir
created.
In order to avoid such performance regression issue, let's record an
entry including directory's ino in global cache whenever we update
directory's xattr data, and then triggerring checkpoint() only if
xattr metadata of target file's parent was updated.
This patch updates to cover below no encryption case as well:
1) parent is checkpointed
2) set_xattr(dir) w/ new xnid
3) create(file)
4) fsync(file)
Fixes: bbf156f7afa7 ("f2fs: fix lost xattrs of directories")
Reported-by: wangzijie <wangzijie1@xxxxxxxxx>
Reported-by: Zhiguo Niu <zhiguo.niu@xxxxxxxxxx>
Tested-by: Zhiguo Niu <zhiguo.niu@xxxxxxxxxx>
Reported-by: Yunlei He <heyunlei@xxxxxxxxxxx>
Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 2b540d87859e0..dc637dfb1ead2 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -284,6 +284,7 @@ enum {
APPEND_INO, /* for append ino list */
UPDATE_INO, /* for update ino list */
TRANS_DIR_INO, /* for transactions dir ino list */
+ XATTR_DIR_INO, /* for xattr updated dir ino list */
FLUSH_INO, /* for multiple device flushing */
MAX_INO_ENTRY, /* max. list */
};
@@ -1137,6 +1138,7 @@ enum cp_reason_type {
CP_FASTBOOT_MODE,
CP_SPEC_LOG_NUM,
CP_RECOVER_DIR,
+ CP_XATTR_DIR,
};
enum iostat_type {
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 62f2521cd955e..6ce8997fc61e0 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -217,6 +217,9 @@ static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
TRANS_DIR_INO))
cp_reason = CP_RECOVER_DIR;
+ else if (f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
+ XATTR_DIR_INO))
+ cp_reason = CP_XATTR_DIR;
return cp_reason;
}
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 6ee71a2faa75f..65437c18e01d3 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -629,6 +629,7 @@ static int __f2fs_setxattr(struct inode *inode, int index,
const char *name, const void *value, size_t size,
struct page *ipage, int flags)
{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct f2fs_xattr_entry *here, *last;
void *base_addr, *last_base_addr;
int found, newsize;
@@ -772,9 +773,18 @@ static int __f2fs_setxattr(struct inode *inode, int index,
if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
!strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
f2fs_set_encrypted_inode(inode);
- if (S_ISDIR(inode->i_mode))
- set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
+ if (!S_ISDIR(inode->i_mode))
+ goto same;
+ /*
+ * In restrict mode, fsync() always try to trigger checkpoint for all
+ * metadata consistency, in other mode, it triggers checkpoint when
+ * parent's xattr metadata was updated.
+ */
+ if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
+ set_sbi_flag(sbi, SBI_NEED_CP);
+ else
+ f2fs_add_ino_entry(sbi, inode->i_ino, XATTR_DIR_INO);
same:
if (is_inode_flag_set(inode, FI_ACL_MODE)) {
inode->i_mode = F2FS_I(inode)->i_acl_mode;
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 5f58684f6107a..9f0883e9ab3eb 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -138,7 +138,8 @@ TRACE_DEFINE_ENUM(EX_READ);
{ CP_NODE_NEED_CP, "node needs cp" }, \
{ CP_FASTBOOT_MODE, "fastboot mode" }, \
{ CP_SPEC_LOG_NUM, "log type is 2" }, \
- { CP_RECOVER_DIR, "dir needs recovery" })
+ { CP_RECOVER_DIR, "dir needs recovery" }, \
+ { CP_XATTR_DIR, "dir's xattr updated" })
#define show_shutdown_mode(type) \
__print_symbolic(type, \
