diff options
| author | Jens Axboe <axboe@kernel.dk> | 2024-03-13 09:56:14 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-28 21:58:53 +0100 |
| commit | 9aeb68337af7776d7f6bb1d3edf8e658a61ee465 (patch) | |
| tree | 5448266f9053bdc368e3bee683f9421fd4a29d9b /include/uapi | |
| parent | 7710c04d34e83236bbb6136a2e669fc8649693ad (diff) | |
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/uapi')
| -rw-r--r-- | include/uapi/linux/io_uring.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 9eff86acdfec..8f8e39cd183e 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -379,6 +379,7 @@ enum { #define IORING_OFF_SQ_RING 0ULL #define IORING_OFF_CQ_RING 0x8000000ULL #define IORING_OFF_SQES 0x10000000ULL +#define IORING_OFF_MMAP_MASK 0xf8000000ULL /* * Filled with the offset for mmap(2) |