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| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-07-07 16:13:16 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-25 02:39:17 +0200 |
| commit | b21a51e26e9aed66159c2c18651da22d585d2998 (patch) | |
| tree | f3e46e18d5f03728097698e71a5f76abcbb168f1 /io_uring | |
| parent | io_uring: don't race double poll setting REQ_F_ASYNC_DATA (diff) | |
| download | linux-b21a51e26e9aed66159c2c18651da22d585d2998.tar.xz linux-b21a51e26e9aed66159c2c18651da22d585d2998.zip | |
io_uring: clear REQ_F_HASH_LOCKED on hash removal
Instead of clearing REQ_F_HASH_LOCKED while arming a poll, unset the bit
when we're removing the entry from the table in io_poll_tw_hash_eject().
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/02e48bb88d6f1480c94ac2924c43ad1fbd48e92a.1657203020.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/poll.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/io_uring/poll.c b/io_uring/poll.c index c1359d45a396..77b669b06046 100644 --- a/io_uring/poll.c +++ b/io_uring/poll.c @@ -132,6 +132,7 @@ static void io_poll_tw_hash_eject(struct io_kiocb *req, bool *locked) */ io_tw_lock(ctx, locked); hash_del(&req->hash_node); + req->flags &= ~REQ_F_HASH_LOCKED; } else { io_poll_req_delete(req, ctx); } @@ -617,9 +618,7 @@ int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags) * apoll requests already grab the mutex to complete in the tw handler, * so removal from the mutex-backed hash is free, use it by default. */ - if (issue_flags & IO_URING_F_UNLOCKED) - req->flags &= ~REQ_F_HASH_LOCKED; - else + if (!(issue_flags & IO_URING_F_UNLOCKED)) req->flags |= REQ_F_HASH_LOCKED; if (!def->pollin && !def->pollout) @@ -880,8 +879,6 @@ int io_poll_add(struct io_kiocb *req, unsigned int issue_flags) if (!(issue_flags & IO_URING_F_UNLOCKED) && (req->ctx->flags & (IORING_SETUP_SQPOLL | IORING_SETUP_SINGLE_ISSUER))) req->flags |= REQ_F_HASH_LOCKED; - else - req->flags &= ~REQ_F_HASH_LOCKED; ret = __io_arm_poll_handler(req, poll, &ipt, poll->events, issue_flags); if (ret > 0) { |