From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Subject: [PATCH v2 3/9] io_uring: use inflight_entry list for iopoll'ing
Date: Mon, 13 Jul 2020 23:37:10 +0300 [thread overview]
Message-ID: <58103f6547b39b20bd8594f0bf7afb6dd97a1798.1594670798.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>
req->inflight_entry is used to track requests that grabbed files_struct.
Let's share it with iopoll list, because the only iopoll'ed ops are
reads and writes, which don't need a file table.
Signed-off-by: Pavel Begunkov <[email protected]>
---
fs/io_uring.c | 26 +++++++++++++++-----------
1 file changed, 15 insertions(+), 11 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 03bb8a69d09c..1ad6d47a6223 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -650,6 +650,10 @@ struct io_kiocb {
struct list_head link_list;
+ /*
+ * 1. used with ctx->iopoll_list with reads/writes
+ * 2. to track reqs with ->files (see io_op_def::file_table)
+ */
struct list_head inflight_entry;
struct percpu_ref *fixed_file_refs;
@@ -1942,8 +1946,8 @@ static void io_iopoll_queue(struct list_head *again)
struct io_kiocb *req;
do {
- req = list_first_entry(again, struct io_kiocb, list);
- list_del(&req->list);
+ req = list_first_entry(again, struct io_kiocb, inflight_entry);
+ list_del(&req->inflight_entry);
if (!io_rw_reissue(req, -EAGAIN))
io_complete_rw_common(&req->rw.kiocb, -EAGAIN, NULL);
} while (!list_empty(again));
@@ -1966,13 +1970,13 @@ static void io_iopoll_complete(struct io_ring_ctx *ctx, unsigned int *nr_events,
while (!list_empty(done)) {
int cflags = 0;
- req = list_first_entry(done, struct io_kiocb, list);
+ req = list_first_entry(done, struct io_kiocb, inflight_entry);
if (READ_ONCE(req->result) == -EAGAIN) {
req->iopoll_completed = 0;
- list_move_tail(&req->list, &again);
+ list_move_tail(&req->inflight_entry, &again);
continue;
}
- list_del(&req->list);
+ list_del(&req->inflight_entry);
if (req->flags & REQ_F_BUFFER_SELECTED)
cflags = io_put_kbuf(req);
@@ -2008,7 +2012,7 @@ static int io_do_iopoll(struct io_ring_ctx *ctx, unsigned int *nr_events,
spin = !ctx->poll_multi_file && *nr_events < min;
ret = 0;
- list_for_each_entry_safe(req, tmp, &ctx->iopoll_list, list) {
+ list_for_each_entry_safe(req, tmp, &ctx->iopoll_list, inflight_entry) {
struct kiocb *kiocb = &req->rw.kiocb;
/*
@@ -2017,7 +2021,7 @@ static int io_do_iopoll(struct io_ring_ctx *ctx, unsigned int *nr_events,
* and complete those lists first, if we have entries there.
*/
if (READ_ONCE(req->iopoll_completed)) {
- list_move_tail(&req->list, &done);
+ list_move_tail(&req->inflight_entry, &done);
continue;
}
if (!list_empty(&done))
@@ -2029,7 +2033,7 @@ static int io_do_iopoll(struct io_ring_ctx *ctx, unsigned int *nr_events,
/* iopoll may have completed current req */
if (READ_ONCE(req->iopoll_completed))
- list_move_tail(&req->list, &done);
+ list_move_tail(&req->inflight_entry, &done);
if (ret && spin)
spin = false;
@@ -2296,7 +2300,7 @@ static void io_iopoll_req_issued(struct io_kiocb *req)
struct io_kiocb *list_req;
list_req = list_first_entry(&ctx->iopoll_list, struct io_kiocb,
- list);
+ inflight_entry);
if (list_req->file != req->file)
ctx->poll_multi_file = true;
}
@@ -2306,9 +2310,9 @@ static void io_iopoll_req_issued(struct io_kiocb *req)
* it to the front so we find it first.
*/
if (READ_ONCE(req->iopoll_completed))
- list_add(&req->list, &ctx->iopoll_list);
+ list_add(&req->inflight_entry, &ctx->iopoll_list);
else
- list_add_tail(&req->list, &ctx->iopoll_list);
+ list_add_tail(&req->inflight_entry, &ctx->iopoll_list);
if ((ctx->flags & IORING_SETUP_SQPOLL) &&
wq_has_sleeper(&ctx->sqo_wait))
--
2.24.0
next prev parent reply other threads:[~2020-07-13 20:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 20:37 [PATCH v2 0/9] scrap 24 bytes from io_kiocb Pavel Begunkov
2020-07-13 20:37 ` [PATCH v2 1/9] io_uring: share completion list w/ per-op space Pavel Begunkov
2020-07-13 20:37 ` [PATCH v2 2/9] io_uring: rename ctx->poll into ctx->iopoll Pavel Begunkov
2020-07-13 20:37 ` Pavel Begunkov [this message]
2020-07-13 20:37 ` [PATCH v2 4/9] io_uring: use completion list for CQ overflow Pavel Begunkov
2020-07-13 20:37 ` [PATCH v2 5/9] io_uring: add req->timeout.list Pavel Begunkov
2020-07-13 20:37 ` [PATCH v2 6/9] io_uring: remove init for unused list Pavel Begunkov
2020-07-13 20:37 ` [PATCH v2 7/9] io_uring: use non-intrusive list for defer Pavel Begunkov
2020-07-13 20:37 ` [PATCH v2 8/9] io_uring: remove sequence from io_kiocb Pavel Begunkov
2020-07-13 20:37 ` [PATCH v2 9/9] io_uring: place cflags into completion data Pavel Begunkov
2020-07-13 21:10 ` [PATCH v2 0/9] scrap 24 bytes from io_kiocb Jens Axboe
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=58103f6547b39b20bd8594f0bf7afb6dd97a1798.1594670798.git.asml.silence@gmail.com \
[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