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io_uring: refactor tctx_task_work

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Merge almost identical sections of tctx_task_work(), this will make code
modifications later easier and also inlines handle_tw_list().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d06592d91e3e7559e7a4dbb8907d110863008dc7.1674484266.git.asml.silence@gmail.com
[axboe: fold in setting count to zero patch from Tom Rix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2023-01-23 14:37:18 +00:00 committed by Jens Axboe
parent 5afa465071
commit cb6bf7f285
1 changed files with 5 additions and 8 deletions
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13
io_uring/io_uring.c
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@ -1166,7 +1166,7 @@ static unsigned int handle_tw_list(struct llist_node *node,
{
unsigned int count = 0;
while (node != last) {
while (node && node != last) {
struct llist_node *next = node->next;
struct io_kiocb *req = container_of(node, struct io_kiocb,
io_task_work.node);
@ -1226,23 +1226,20 @@ void tctx_task_work(struct callback_head *cb)
task_work);
struct llist_node fake = {};
struct llist_node *node;
unsigned int loops = 1;
unsigned int count;
unsigned int loops = 0;
unsigned int count = 0;
if (unlikely(current->flags & PF_EXITING)) {
io_fallback_tw(tctx);
return;
}
node = io_llist_xchg(&tctx->task_list, &fake);
count = handle_tw_list(node, &ctx, &uring_locked, NULL);
node = io_llist_cmpxchg(&tctx->task_list, &fake, NULL);
while (node != &fake) {
do {
loops++;
node = io_llist_xchg(&tctx->task_list, &fake);
count += handle_tw_list(node, &ctx, &uring_locked, &fake);
node = io_llist_cmpxchg(&tctx->task_list, &fake, NULL);
}
} while (node != &fake);
ctx_flush_and_put(ctx, &uring_locked);