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From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Subject: [PATCH 4/4] io_uring: toss io_kiocb fields for better caching
Date: Thu, 15 Oct 2020 22:11:24 +0100	[thread overview]
Message-ID: <bb960925b9fba8a23c86ddaf7c52ff91288afc49.1602795685.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>

We've got extra 8 bytes in the 2nd cacheline, put ->fixed_file_refs
there, so inline execution path mostly doesn't touch the 3rd cacheline
for fixed_file requests as well.

Signed-off-by: Pavel Begunkov <[email protected]>
---
 fs/io_uring.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index fd5360a238a7..f3f4cb538d43 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -675,14 +675,13 @@ struct io_kiocb {
 	u64				user_data;
 
 	struct io_kiocb			*link;
+	struct percpu_ref		*fixed_file_refs;
 
 	/*
 	 * 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;
 	struct callback_head		task_work;
 	/* for polled requests, i.e. IORING_OP_POLL_ADD and async armed poll */
 	struct hlist_node		hash_node;
-- 
2.24.0


  parent reply	other threads:[~2020-10-15 21:14 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-15 21:11 [PATCH for-next 0/4] singly linked list for chains Pavel Begunkov
2020-10-15 21:11 ` [PATCH 1/4] io_uring: inline io_fail_links() Pavel Begunkov
2020-10-15 21:11 ` [PATCH 2/4] io_uring: simplify linked timeout cancel Pavel Begunkov
2020-10-15 21:11 ` [PATCH 3/4] io_uring: link requests with singly linked list Pavel Begunkov
2020-10-15 21:11 ` Pavel Begunkov [this message]
2020-10-15 21:15 ` [PATCH for-next 0/4] singly linked list for chains Pavel Begunkov
  -- strict thread matches above, loose matches on Subject: below --
2020-10-27 23:25 [PATCH v2 " Pavel Begunkov
2020-10-27 23:25 ` [PATCH 4/4] io_uring: toss io_kiocb fields for better caching Pavel Begunkov

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