4.14-stable review patch. If anyone has any objections, please let me know.
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From: Jens Axboe axboe@kernel.dk
commit 4ccafe032005e9b96acbef2e389a4de5b1254add upstream.
A previous change blindly added massive alignment to the call_single_data structure in struct request. This ballooned it in size from 296 to 320 bytes on my setup, for no valid reason at all.
Use the unaligned struct __call_single_data variant instead.
Fixes: 966a967116e69 ("smp: Avoid using two cache lines for struct call_single_data") Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- include/linux/blkdev.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -135,7 +135,7 @@ typedef __u32 __bitwise req_flags_t; struct request { struct list_head queuelist; union { - call_single_data_t csd; + struct __call_single_data csd; u64 fifo_time; };