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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-02-23 13:40:22 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-04-12 01:41:59 +0200 |
| commit | 6c2450ae55656f6b0370bfd4cb52ec8a4ecd0916 (patch) | |
| tree | 8e05279baf327e9b85e8cfd47675bada6c32ce2a /include/trace/events | |
| parent | io_uring: mask in error/nval/hangup consistently for poll (diff) | |
| download | linux-6c2450ae55656f6b0370bfd4cb52ec8a4ecd0916.tar.xz linux-6c2450ae55656f6b0370bfd4cb52ec8a4ecd0916.zip | |
io_uring: allocate memory for overflowed CQEs
Instead of using a request itself for overflowed CQE stashing, allocate a
separate entry. The disadvantage is that the allocation may fail and it
will be accounted as lost (see rings->cq_overflow), so we lose reliability
in case of memory pressure if the application is driving the CQ ring into
overflow. However, it opens a way for for multiple CQEs per an SQE and
even generating SQE-less CQEs.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
[axboe: use GFP_ATOMIC | __GFP_ACCOUNT]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/trace/events')
0 files changed, 0 insertions, 0 deletions