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 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
