public inbox for [email protected]
 help / color / mirror / Atom feed
From: Pavel Begunkov <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: [PATCH 09/11] io_uring/memmap: add IO_REGION_F_SINGLE_REF
Date: Wed, 20 Nov 2024 23:33:32 +0000	[thread overview]
Message-ID: <807340ea7288500c76fb693e8a13a3372aba1709.1732144783.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>

Kernel allocated compound pages will have just one reference for the
entire page array, add a flag telling io_free_region about that.

Signed-off-by: Pavel Begunkov <[email protected]>
---
 io_uring/memmap.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/io_uring/memmap.c b/io_uring/memmap.c
index 15fefbed77ec..cdd620bdd3ee 100644
--- a/io_uring/memmap.c
+++ b/io_uring/memmap.c
@@ -198,15 +198,22 @@ void *__io_uaddr_map(struct page ***pages, unsigned short *npages,
 enum {
 	IO_REGION_F_VMAP			= 1,
 	IO_REGION_F_USER_PINNED			= 2,
+	IO_REGION_F_SINGLE_REF			= 4,
 };
 
 void io_free_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr)
 {
 	if (mr->pages) {
+		long nr_pages = mr->nr_pages;
+
+		if (mr->flags & IO_REGION_F_SINGLE_REF)
+			nr_pages = 1;
+
 		if (mr->flags & IO_REGION_F_USER_PINNED)
-			unpin_user_pages(mr->pages, mr->nr_pages);
+			unpin_user_pages(mr->pages, nr_pages);
 		else
-			release_pages(mr->pages, mr->nr_pages);
+			release_pages(mr->pages, nr_pages);
+
 		kvfree(mr->pages);
 	}
 	if ((mr->flags & IO_REGION_F_VMAP) && mr->ptr)
-- 
2.46.0


  parent reply	other threads:[~2024-11-20 23:33 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-11-20 23:33 [PATCH 00/11] support kernel allocated regions Pavel Begunkov
2024-11-20 23:33 ` [PATCH 01/11] io_uring: rename ->resize_lock Pavel Begunkov
2024-11-20 23:33 ` [PATCH 02/11] io_uring/rsrc: export io_check_coalesce_buffer Pavel Begunkov
2024-11-20 23:33 ` [PATCH 03/11] io_uring/memmap: add internal region flags Pavel Begunkov
2024-11-20 23:33 ` [PATCH 04/11] io_uring/memmap: flag regions with user pages Pavel Begunkov
2024-11-20 23:33 ` [PATCH 05/11] io_uring/memmap: account memory before pinning Pavel Begunkov
2024-11-20 23:33 ` [PATCH 06/11] io_uring/memmap: reuse io_free_region for failure path Pavel Begunkov
2024-11-20 23:33 ` [PATCH 07/11] io_uring/memmap: optimise single folio regions Pavel Begunkov
2024-11-20 23:33 ` [PATCH 08/11] io_uring/memmap: helper for pinning region pages Pavel Begunkov
2024-11-20 23:33 ` Pavel Begunkov [this message]
2024-11-20 23:33 ` [PATCH 10/11] io_uring/memmap: implement kernel allocated regions Pavel Begunkov
2024-11-20 23:33 ` [PATCH 11/11] io_uring/memmap: implement mmap for regions Pavel Begunkov
2024-11-21  1:28 ` [PATCH 00/11] support kernel allocated regions 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=807340ea7288500c76fb693e8a13a3372aba1709.1732144783.git.asml.silence@gmail.com \
    [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