6.1 io_uring mmap backport

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Jens Axboe

15 Mar 2025 15 Mar '25

12:59 p.m.

Hi,

I prepared this series about 6 months ago, but never got around to sending it in. In mainline, we got rid of remap_pfn_range() on the io_uring side, and this just backports it to 6.1-stable as well. This eliminates issues with fragmented memory, and hence it'd be nice to have it in 6.1 stable as well.

-- Jens Axboe

Attachments:

0005-io_uring-don-t-attempt-to-mmap-larger-than-what-the-.patch (text/x-patch — 2.2 KB)
0004-io_uring-get-rid-of-remap_pfn_range-for-mapping-ring.patch (text/x-patch — 7.8 KB)
0003-mm-add-nommu-variant-of-vm_insert_pages.patch (text/x-patch — 1.0 KB)
0002-io_uring-add-ring-freeing-helper.patch (text/x-patch — 1.7 KB)
0001-io_uring-return-error-pointer-from-io_mem_alloc.patch (text/x-patch — 2.0 KB)
0006-io_uring-fix-corner-case-forgetting-to-vunmap.patch (text/x-patch — 1.9 KB)

Show replies by date

Greg Kroah-Hartman

16 Mar 16 Mar

6:01 a.m.

On Sat, Mar 15, 2025 at 06:59:55AM -0600, Jens Axboe wrote:

...

Hi,

I prepared this series about 6 months ago, but never got around to sending it in. In mainline, we got rid of remap_pfn_range() on the io_uring side, and this just backports it to 6.1-stable as well. This eliminates issues with fragmented memory, and hence it'd be nice to have it in 6.1 stable as well.

This and the 6.6 set now queued up, thanks.

greg k-h

Jens Axboe

3:08 p.m.

On 3/16/25 12:01 AM, Greg Kroah-Hartman wrote:

...

On Sat, Mar 15, 2025 at 06:59:55AM -0600, Jens Axboe wrote:

...
Hi,

I prepared this series about 6 months ago, but never got around to sending it in. In mainline, we got rid of remap_pfn_range() on the io_uring side, and this just backports it to 6.1-stable as well. This eliminates issues with fragmented memory, and hence it'd be nice to have it in 6.1 stable as well.

This and the 6.6 set now queued up, thanks.

Thanks Greg!

-- Jens Axboe

Jens Axboe

20 Mar 20 Mar

1:04 p.m.

On 3/15/25 6:59 AM, Jens Axboe wrote:

...

Hi,

I prepared this series about 6 months ago, but never got around to sending it in. In mainline, we got rid of remap_pfn_range() on the io_uring side, and this just backports it to 6.1-stable as well. This eliminates issues with fragmented memory, and hence it'd be nice to have it in 6.1 stable as well.

Just in case 6.1 runs into the same missing include issue as 6.6-stable, here's a replacement patch 4 for that series as well that adds the include.

-- Jens Axboe

Greg Kroah-Hartman

1:24 p.m.

On Thu, Mar 20, 2025 at 07:04:43AM -0600, Jens Axboe wrote:

...

On 3/15/25 6:59 AM, Jens Axboe wrote:

...
Hi,

I prepared this series about 6 months ago, but never got around to sending it in. In mainline, we got rid of remap_pfn_range() on the io_uring side, and this just backports it to 6.1-stable as well. This eliminates issues with fragmented memory, and hence it'd be nice to have it in 6.1 stable as well.

Just in case 6.1 runs into the same missing include issue as 6.6-stable, here's a replacement patch 4 for that series as well that adds the include.

Now replaced, thanks!

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Greg Kroah-Hartman
Jens Axboe