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From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Subject: [RFC] io_uring: enable shmem/memfd memory registration
Date: Wed,  9 Jun 2021 15:26:54 +0100	[thread overview]
Message-ID: <52247e3ec36eec9d6af17424937c8d20c497926e.1623248265.git.asml.silence@gmail.com> (raw)

Relax buffer registration restictions, which filters out file backed
memory, and allow shmem/memfd as they have normal anonymous pages
underneath.

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

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 44d1859f0dfb..e980695707ec 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8300,6 +8300,8 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov,
 		for (i = 0; i < nr_pages; i++) {
 			struct vm_area_struct *vma = vmas[i];
 
+			if (vma_is_shmem(vma))
+				continue;
 			if (vma->vm_file &&
 			    !is_file_hugepages(vma->vm_file)) {
 				ret = -EOPNOTSUPP;
-- 
2.31.1


             reply	other threads:[~2021-06-09 14:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-09 14:26 Pavel Begunkov [this message]
2021-06-09 15:12 ` [RFC] io_uring: enable shmem/memfd memory registration Jens Axboe
2021-06-14  0:45   ` Pavel Begunkov
2021-06-15 21:58     ` Jens Axboe

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