Sync redfs rhel9 4 427.42.1 branch to redfs-ubuntu-noble-6.8.0-58.60#97
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bsbernd merged 2 commits intoredfs-rhel9_4-427.42.1from Feb 14, 2026
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This fixes xfstests generic/451 (for both O_DIRECT and FOPEN_DIRECT_IO direct write). Commit b359af8 ("fuse: Invalidate the page cache after FOPEN_DIRECT_IO write") tries to fix the similar issue for FOPEN_DIRECT_IO write, which can be reproduced by xfstests generic/209. It only fixes the issue for synchronous direct write, while omitting the case for asynchronous direct write (exactly targeted by generic/451). While for O_DIRECT direct write, it's somewhat more complicated. For synchronous direct write, generic_file_direct_write() will invalidate the page cache after the write, and thus it can pass generic/209. While for asynchronous direct write, the invalidation in generic_file_direct_write() is bypassed since the invalidation shall be done when the asynchronous IO completes. This is omitted in FUSE and generic/451 fails whereby. Fix this by conveying the invalidation for both synchronous and asynchronous write. - with FOPEN_DIRECT_IO - sync write, invalidate in fuse_send_write() - async write, invalidate in fuse_aio_complete() with FUSE_ASYNC_DIO, fuse_send_write() otherwise - without FOPEN_DIRECT_IO - sync write, invalidate in generic_file_direct_write() - async write, invalidate in fuse_aio_complete() with FUSE_ASYNC_DIO, generic_file_direct_write() otherwise Reviewed-by: Bernd Schubert <bschubert@ddn.com> Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com> (cherry picked from commit f6de786)
Mapping might point to a totally different core due to
random assignment. For performance using the current
core might be beneficial
Example (with core binding)
unpatched WRITE: bw=841MiB/s
patched WRITE: bw=1363MiB/s
With
fio --name=test --ioengine=psync --direct=1 \
--rw=write --bs=1M --iodepth=1 --numjobs=1 \
--filename_format=/redfs/testfile.\$jobnum --size=100G \
--thread --create_on_open=1 --runtime=30s --cpus_allowed=1
In order to get the good number `--cpus_allowed=1` is needed.
This could be improved by a future change that avoids
cpu migration in fuse_request_end() on wake_up() call.
(cherry picked from commit 32e0073)
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57a83cdfhas an invalid cherry-pick id, which is why1607a036and57a83cdfare not detected as the same commit