From: Pavel Begunkov <[email protected]>
To: [email protected], [email protected],
[email protected]
Cc: Jakub Kicinski <[email protected]>,
Jonathan Lemon <[email protected]>,
"David S . Miller" <[email protected]>,
Willem de Bruijn <[email protected]>,
Eric Dumazet <[email protected]>,
David Ahern <[email protected]>, Jens Axboe <[email protected]>,
Pavel Begunkov <[email protected]>
Subject: [RFC v2 19/19] io_uring: optimise task referencing by notifiers
Date: Tue, 21 Dec 2021 15:35:41 +0000 [thread overview]
Message-ID: <465e422a249a5eaad413a6488568a03a2160c066.1640029579.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>
Use io_put_task()/etc. infra holding task references for notifiers, so
we can get rid of atomics there.
Signed-off-by: Pavel Begunkov <[email protected]>
---
fs/io_uring.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index ee496b463462..0eadf4ee5402 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2008,7 +2008,7 @@ static void io_uring_tx_zerocopy_callback(struct sk_buff *skb,
if (unlikely(!notifier->task))
goto fallback;
- put_task_struct(notifier->task);
+ io_put_task(notifier->task, 1);
notifier->task = NULL;
if (!in_interrupt()) {
@@ -2034,7 +2034,8 @@ static inline void __io_tx_kill_notification(struct io_tx_ctx *tx_ctx)
static inline void io_tx_kill_notification(struct io_tx_ctx *tx_ctx)
{
- tx_ctx->notifier->task = get_task_struct(current);
+ tx_ctx->notifier->task = current;
+ io_get_task_refs(1);
__io_tx_kill_notification(tx_ctx);
}
--
2.34.1
next prev parent reply other threads:[~2021-12-21 15:36 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-21 15:35 [RFC v2 00/19] io_uring zerocopy tx Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 01/19] skbuff: add SKBFL_DONT_ORPHAN flag Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 02/19] skbuff: pass a struct ubuf_info in msghdr Pavel Begunkov
2022-01-11 13:51 ` Hao Xu
2022-01-11 15:50 ` Pavel Begunkov
2022-01-12 3:39 ` Hao Xu
2022-01-12 16:53 ` Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 03/19] net: add zerocopy_sg_from_iter for bvec Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 04/19] net: optimise page get/free for bvec zc Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 05/19] net: don't track pfmemalloc for zc registered mem Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 06/19] ipv4/udp: add support msgdr::msg_ubuf Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 07/19] ipv6/udp: " Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 08/19] ipv4: avoid partial copy for zc Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 09/19] ipv6: " Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 10/19] io_uring: add send notifiers registration Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 11/19] io_uring: infrastructure for send zc notifications Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 12/19] io_uring: wire send zc request type Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 13/19] io_uring: add an option to flush zc notifications Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 14/19] io_uring: opcode independent fixed buf import Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 15/19] io_uring: sendzc with fixed buffers Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 16/19] io_uring: cache struct ubuf_info Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 17/19] io_uring: unclog ctx refs waiting with zc notifiers Pavel Begunkov
2021-12-21 15:35 ` [RFC v2 18/19] io_uring: task_work for notification delivery Pavel Begunkov
2021-12-21 15:35 ` Pavel Begunkov [this message]
2021-12-21 15:43 ` [RFC v2 00/19] io_uring zerocopy tx Pavel Begunkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=465e422a249a5eaad413a6488568a03a2160c066.1640029579.git.asml.silence@gmail.com \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox