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f2fs-5.13-rc1-fix
f2fs-5.13-rc1-fix This series of patches fix some critical bugs such as memory leak in compression flows, kernel panic when handling errors, and swapon failure due to newly added condition check.
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f2fs-for-5.13-rc1
f2fs-for-5.13-rc1 In this round, we added a new mount option, "checkpoint_merge", which introduces a kernel thread dealing with the f2fs checkpoints. Once we start to manage the IO priority along with blk-cgroup, the checkpoint operation can be processed in a lower priority under the process context. Since the checkpoint holds all the filesystem operations, we give a higher priority to the checkpoint thread all the time. Enhancement: - introduce gc_merge mount option to introduce a checkpoint thread - improve to run discard thread efficiently - allow modular compression algorithms - expose # of overprivision segments to sysfs - expose runtime compression stat to sysfs Bug fix: - fix OOB memory access by the node id lookup - avoid touching checkpointed data in the checkpoint-disabled mode - fix the resizing flow to avoid kernel panic and race conditions - fix block allocation issues on pinned files - address some swapfile issues - fix hugtask problem and kernel panic during atomic write operations - don't start checkpoint thread in RO And, we've cleaned up some kernel coding style and build warnings. In addition, we fixed some minor race conditions and error handling routines.
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f2fs-for-5.12-rc1
f2fs-for-5.12-rc1 We've added two major features: 1) compression level and 2) checkpoint_merge, in this round. 1) compression level expands 'compress_algorithm' mount option to accept parameter as format of <algorithm>:<level>, by this way, it gives a way to allow user to do more specified config on lz4 and zstd compression level, then f2fs compression can provide higher compress ratio. 2) checkpoint_merge creates a kernel daemon and makes it to merge concurrent checkpoint requests as much as possible to eliminate redundant checkpoint issues. Plus, we can eliminate the sluggish issue caused by slow checkpoint operation when the checkpoint is done in a process context in a cgroup having low i/o budget and cpu shares. Enhancement: - add compress level for lz4 and zstd in mount option - checkpoint_merge mount option - deprecate f2fs_trace_io Bug fix: - flush data when enabling checkpoint back - handle corner cases of mount options - missing ACL update and lock for I_LINKABLE flag - attach FIEMAP_EXTENT_MERGED in f2fs_fiemap - fix potential deadlock in compression flow - fix wrong submit_io condition As usual, we've cleaned up many code flows and fixed minor bugs.