Re: [f2fs-dev] [PATCH] generic/064: allow 50 extents on F2FS after fcollapse
Chao Yu via Linux-f2fs-devel <[email protected]>
| Newsgroups | net.sourceforge.lists.linux-f2fs-devel,org.kernel.vger.fstests |
|---|---|
| Message-ID | <[email protected]> |
On 6/22/26 15:04, Jan Prusakowski via Linux-f2fs-devel wrote: > On F2FS, generic/064 fails with "extents mismatched before = 1 after = > 50" following multiple fcollapse (collapse range) operations. > > To ensure crash consistency and checkpoint integrity, F2FS forbids > in-place SSR (Summary Standalone Replacement) overwrites on valid > checkpointed blocks. When collapse range shifts blocks, F2FS allocates > new data pages in LFS mode (out-of-place log writes). As a result, > sequential collapse range calls rewrite shifted blocks at new log > locations, intentionally leaving the file with 50 extents. > > Adjust the extent verification in generic/064 to expect exactly 50 > extents on F2FS, while preserving the strict 1-extent requirement for > all other filesystems. Data integrity continues to be verified via byte > comparison. > > Signed-off-by: Jaegeuk Kim <[email protected]> > Signed-off-by: Jan Prusakowski <[email protected]> Reviewed-by: Chao Yu <[email protected]> Thanks, _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel