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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-02-04 13:52:02 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-02-04 08:05:46 -0700 |
| commit | 7335e3bf9d0a92be09bb4f38d06ab22c40f0fead (patch) | |
| tree | a0f8ea4b3110ad63f38aed94f8560ed7644ebf28 /tools/perf/scripts/python/flamegraph.py | |
| parent | io_uring: let io_setup_async_rw take care of iovec (diff) | |
| download | linux-7335e3bf9d0a92be09bb4f38d06ab22c40f0fead.tar.gz linux-7335e3bf9d0a92be09bb4f38d06ab22c40f0fead.zip | |
io_uring: don't forget to adjust io_size
We have invariant in io_read() of how much we're trying to read spilled
into an iter and io_size variable. The last one controls decision making
about whether to do read-retries. However, io_size is modified only
after the first read attempt, so if we happen to go for a third retry in
a single call to io_read(), we will get io_size greater than in the
iterator, so may lead to various side effects up to live-locking.
Modify io_size each time.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions