From 936b33f7243fa1e54c8f4f2febd3472cc00e66fd Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Thu, 9 May 2019 12:51:27 -0600 Subject: 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: Mikulas Patocka Signed-off-by: Jens Axboe --- drivers/block/brd.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/block/brd.c') diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 17defbf4f332..2da615b45b31 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -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, -- cgit v1.2.3-58-ga151