Patch "io_uring: put provided buffer meta data under memcg accounting" has been added to the 5.14-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    io_uring: put provided buffer meta data under memcg accounting

to the 5.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     io_uring-put-provided-buffer-meta-data-under-memcg-a.patch
and it can be found in the queue-5.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 3d2a0d0b3a1597944ff9a53105cdef8c4b2ede1c
Author: Jens Axboe <axboe@xxxxxxxxx>
Date:   Fri Sep 24 07:39:08 2021 -0600

    io_uring: put provided buffer meta data under memcg accounting
    
    [ Upstream commit 9990da93d2bf9892c2c14c958bef050d4e461a1a ]
    
    For each provided buffer, we allocate a struct io_buffer to hold the
    data associated with it. As a large number of buffers can be provided,
    account that data with memcg.
    
    Fixes: ddf0322db79c ("io_uring: add IORING_OP_PROVIDE_BUFFERS")
    Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 739e58ccc982..187eb1907bde 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4043,7 +4043,7 @@ static int io_add_buffers(struct io_provide_buf *pbuf, struct io_buffer **head)
 	int i, bid = pbuf->bid;
 
 	for (i = 0; i < pbuf->nbufs; i++) {
-		buf = kmalloc(sizeof(*buf), GFP_KERNEL);
+		buf = kmalloc(sizeof(*buf), GFP_KERNEL_ACCOUNT);
 		if (!buf)
 			break;