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| author | Chao Yu <chao@kernel.org> | 2024-11-22 14:50:05 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-14 20:04:06 +0100 |
| commit | 7c2e5ed2175e4ab5174f57e29f6c611b6e8f55c7 (patch) | |
| tree | 84352919203afe412c7ced06f3e6909aba64f513 /Documentation | |
| parent | 924f7dd1e832e4e4530d14711db223d2803f7b61 (diff) | |
| download | linux-7c2e5ed2175e4ab5174f57e29f6c611b6e8f55c7.tar.gz linux-7c2e5ed2175e4ab5174f57e29f6c611b6e8f55c7.tar.bz2 linux-7c2e5ed2175e4ab5174f57e29f6c611b6e8f55c7.zip | |
f2fs: add a sysfs node to limit max read extent count per-inode
[ Upstream commit 009a8241a8e5a14ea2dd0b8db42dbf283527dd44 ]
Quoted:
"at this time, there are still 1086911 extent nodes in this zombie
extent tree that need to be cleaned up.
crash_arm64_sprd_v8.0.3++> extent_tree.node_cnt ffffff80896cc500
node_cnt = {
counter = 1086911
},
"
As reported by Xiuhong, there will be a huge number of extent nodes
in extent tree, it may potentially cause:
- slab memory fragments
- extreme long time shrink on extent tree
- low mapping efficiency
Let's add a sysfs node to limit max read extent count for each inode,
by default, value of this threshold is 10240, it can be updated
according to user's requirement.
Reported-by: Xiuhong Wang <xiuhong.wang@unisoc.com>
Closes: https://lore.kernel.org/linux-f2fs-devel/20241112110627.1314632-1-xiuhong.wang@unisoc.com/
Signed-off-by: Xiuhong Wang <xiuhong.wang@unisoc.com>
Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 513296bb6f29..3e1630c70d8a 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -822,3 +822,9 @@ Description: It controls the valid block ratio threshold not to trigger excessiv for zoned deivces. The initial value of it is 95(%). F2FS will stop the background GC thread from intiating GC for sections having valid blocks exceeding the ratio. + +What: /sys/fs/f2fs/<disk>/max_read_extent_count +Date: November 2024 +Contact: "Chao Yu" <chao@kernel.org> +Description: It controls max read extent count for per-inode, the value of threshold + is 10240 by default. |