Commit 187f08c1 authored by wangyangbo's avatar wangyangbo Committed by Jens Axboe
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io_uring: Add register support for non-4k PAGE_SIZE 



Now allocated rsrc table uses PAGE_SIZE as the size of 2nd-level, and
accessing this table relies on each level index from fixed TABLE_SHIFT
(12 - 3) in 4k page case. In order to correctly work in non-4k page,
define TABLE_SHIFT as non-fixed (PAGE_SHIFT - shift of data) for
2nd-level table entry number.

Signed-off-by: default avatarwangyangbo <wangyangbo@uniontech.com>
Link: https://lore.kernel.org/r/20210819055657.27327-1-wangyangbo@uniontech.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent e98e49b2

fs/io_uring.c

+2 −2
Original line number Diff line number Diff line
@@ -92,12 +92,12 @@ 
#define IORING_MAX_CQ_ENTRIES	(2 * IORING_MAX_ENTRIES)

#define IORING_SQPOLL_CAP_ENTRIES_VALUE 8



/* 512 entries per page on 64-bit archs, 64 pages max */

/* only define max */

#define IORING_MAX_FIXED_FILES	(1U << 15)

#define IORING_MAX_RESTRICTIONS	(IORING_RESTRICTION_LAST + \

				 IORING_REGISTER_LAST + IORING_OP_LAST)



#define IO_RSRC_TAG_TABLE_SHIFT	9

#define IO_RSRC_TAG_TABLE_SHIFT	(PAGE_SHIFT - 3)

#define IO_RSRC_TAG_TABLE_MAX	(1U << IO_RSRC_TAG_TABLE_SHIFT)

#define IO_RSRC_TAG_TABLE_MASK	(IO_RSRC_TAG_TABLE_MAX - 1)