Commit 936b33f7 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Jens Axboe
Browse files

brd: add cond_resched to brd_free_pages 



The loop that frees all the pages can take unbounded amount of time, so
add cond_resched() to it.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent cf12c672

drivers/block/brd.c

+6 −0
Original line number Diff line number Diff line
@@ -152,6 +152,12 @@ static void brd_free_pages(struct brd_device *brd) 


		pos++;



		/*

		 * It takes 3.4 seconds to remove 80GiB ramdisk.

		 * So, we need cond_resched to avoid stalling the CPU.

		 */

		cond_resched();



		/*

		 * This assumes radix_tree_gang_lookup always returns as

		 * many pages as possible. If the radix-tree code changes,