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| author | Jens Axboe <axboe@kernel.dk> | 2024-03-13 18:56:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-28 23:58:53 +0300 |
| commit | 9aeb68337af7776d7f6bb1d3edf8e658a61ee465 (patch) | |
| tree | 5448266f9053bdc368e3bee683f9421fd4a29d9b /include/linux | |
| parent | 7710c04d34e83236bbb6136a2e669fc8649693ad (diff) | |
| download | linux-9aeb68337af7776d7f6bb1d3edf8e658a61ee465.tar.xz | |
io_uring: get rid of remap_pfn_range() for mapping rings/sqes
Commit 3ab1db3c6039e02a9deb9d5091d28d559917a645 upstream.
Rather than use remap_pfn_range() for this and manually free later,
switch to using vm_insert_pages() and have it Just Work.
If possible, allocate a single compound page that covers the range that
is needed. If that works, then we can just use page_address() on that
page. If we fail to get a compound page, allocate single pages and use
vmap() to map them into the kernel virtual address space.
This just covers the rings/sqes, the other remaining user of the mmap
remap_pfn_range() user will be converted separately. Once that is done,
we can kill the old alloc/free code.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/io_uring_types.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index 37aeea266ebb..2bd01109e0ec 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -352,6 +352,11 @@ struct io_ring_ctx { unsigned sq_thread_idle; /* protected by ->completion_lock */ unsigned evfd_last_cq_tail; + + unsigned short n_ring_pages; + unsigned short n_sqe_pages; + struct page **ring_pages; + struct page **sqe_pages; }; enum { |