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| author | Naohiro Aota <naohiro.aota@wdc.com> | 2023-12-19 01:02:29 +0900 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2024-01-12 01:59:43 +0100 |
| commit | 02444f2ac26eae6385a65fcd66915084d15dffba (patch) | |
| tree | 500d74c6e6b5df1fb7a3b726deb7fcbd3911c0b6 /lib/test_fortify/write_overflow-strlcpy-src.c | |
| parent | b271fee9a41ca1474d30639fd6cc912c9901d0f8 (diff) | |
btrfs: zoned: optimize hint byte for zoned allocator
Writing sequentially to a huge file on btrfs on a SMR HDD revealed a
decline of the performance (220 MiB/s to 30 MiB/s after 500 minutes).
The performance goes down because of increased latency of the extent
allocation, which is induced by a traversing of a lot of full block groups.
So, this patch optimizes the ffe_ctl->hint_byte by choosing a block group
with sufficient size from the active block group list, which does not
contain full block groups.
After applying the patch, the performance is maintained well.
Fixes: 2eda57089ea3 ("btrfs: zoned: implement sequential extent allocation")
CC: stable@vger.kernel.org # 5.15+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'lib/test_fortify/write_overflow-strlcpy-src.c')
0 files changed, 0 insertions, 0 deletions