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* [PATCH v4 0/4] Speed up f2fs truncate
@ 2024-12-23  8:10 Yi Sun
  2024-12-23  8:10 ` [PATCH v4 1/4] f2fs: introduce update_sit_entry_for_release/alloc() Yi Sun
                   ` (5 more replies)
  0 siblings, 6 replies; 12+ messages in thread
From: Yi Sun @ 2024-12-23  8:10 UTC (permalink / raw)
  To: chao, jaegeuk
  Cc: sunyibuaa, yi.sun, linux-f2fs-devel, linux-kernel, niuzhiguo84,
	Hao_hao.Wang, ke.wang

Deleting large files is time-consuming, and a large part
of the time is spent in f2fs_invalidate_blocks()
->down_write(sit_info->sentry_lock) and up_write().

If some blocks are continuous, we can process these blocks
at the same time. This can reduce the number of calls to
the down_write() and the up_write(), thereby improving the
overall speed of doing truncate.

Test steps:
Set the CPU and DDR frequencies to the maximum.
dd if=/dev/random of=./test.txt bs=1M count=100000
sync
rm test.txt

Time Comparison of rm:
original        optimization            ratio
7.17s           3.27s                   54.39%

----
v4:
- introduce update_sit_entry_for_alloc().
- [patch 2,3,4 / 4] have no changes compared to v3.

Yi Sun (4):
  f2fs: introduce update_sit_entry_for_release/alloc()
  f2fs: update_sit_entry_for_release() supports consecutive blocks.
  f2fs: add parameter @len to f2fs_invalidate_blocks()
  f2fs: Optimize f2fs_truncate_data_blocks_range()

 fs/f2fs/compress.c |   4 +-
 fs/f2fs/f2fs.h     |   3 +-
 fs/f2fs/file.c     |  78 +++++++++++++++++--
 fs/f2fs/node.c     |   4 +-
 fs/f2fs/segment.c  | 185 +++++++++++++++++++++++++++++----------------
 5 files changed, 198 insertions(+), 76 deletions(-)

-- 
2.25.1


^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2025-01-15  5:11 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-12-23  8:10 [PATCH v4 0/4] Speed up f2fs truncate Yi Sun
2024-12-23  8:10 ` [PATCH v4 1/4] f2fs: introduce update_sit_entry_for_release/alloc() Yi Sun
2024-12-26 14:00   ` Chao Yu
2024-12-23  8:10 ` [PATCH v4 2/4] f2fs: update_sit_entry_for_release() supports consecutive blocks Yi Sun
2024-12-26 14:16   ` Chao Yu
2024-12-23  8:10 ` [PATCH v4 3/4] f2fs: add parameter @len to f2fs_invalidate_blocks() Yi Sun
2025-01-13 13:49   ` Chao Yu
2024-12-23  8:10 ` [PATCH v4 4/4] f2fs: Optimize f2fs_truncate_data_blocks_range() Yi Sun
2025-01-14  4:28   ` Chao Yu
2025-01-15  5:09     ` 答复: " 孙毅 (Yi Sun)
2025-01-08 18:40 ` [f2fs-dev] [PATCH v4 0/4] Speed up f2fs truncate patchwork-bot+f2fs
2025-01-13 18:51 ` patchwork-bot+f2fs

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