io_uring: bump max direct descriptor count to 1M

We currently limit these to 32K, but since we're now backing the table
space with vmalloc when needed, there's no reason why we can't make it
bigger. The total space is limited by RLIMIT_NOFILE as well.

Reviewed-by: Hao Xu <howeyxu@tencent.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index dc75c43bc9b228c678b010d736dc7efdc399dc80..b75a49d3831b7fb13e6be241e1aa5ae14fbe297b 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -94,7 +94,7 @@
 #define IORING_SQPOLL_CAP_ENTRIES_VALUE 8
 
 /* only define max */
-#define IORING_MAX_FIXED_FILES (1U << 15)
+#define IORING_MAX_FIXED_FILES (1U << 20)
 #define IORING_MAX_RESTRICTIONS        (IORING_RESTRICTION_LAST + \
                                 IORING_REGISTER_LAST + IORING_OP_LAST)