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Commit 936b33f7 authored May 09, 2019 by Mikulas Patocka Committed by Jens Axboe May 09, 2019

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 <mpatocka@redhat.com>
Signed-off-by: Jens 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,