From: Daniel Xu <dxu@dxuuu.xyz>
Date: Sat, 14 Sep 2019 21:23:45 +0000 (-0700)
Subject: io_uring: increase IORING_MAX_ENTRIES to 32K
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5277deaab9f98229bdfb8d1e30019b6c25052708;p=linux.git

io_uring: increase IORING_MAX_ENTRIES to 32K

Some workloads can require far more than 4K oustanding entries. For
example memcached can have ~300K sockets over ~40 cores. Bumping the max
to 32K seems to work pretty well.

Reported-by: Dan Melnic <dmm@fb.com>
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 3c8859d417eb5..0dadbdbead0fb 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -75,7 +75,7 @@
 
 #include "internal.h"
 
-#define IORING_MAX_ENTRIES	4096
+#define IORING_MAX_ENTRIES	32768
 #define IORING_MAX_FIXED_FILES	1024
 
 struct io_uring {