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| author | Mikulas Patocka <mpatocka@redhat.com> | 2019-05-09 21:51:27 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-05-09 21:51:27 +0300 |
| commit | 936b33f7243fa1e54c8f4f2febd3472cc00e66fd (patch) | |
| tree | c2e31826acd168dcbec573f6f5d60fc0d85aa7ca /drivers/block/brd.c | |
| parent | cf12c6729c7405c06b3e1bfccac7aa7ad007e1b7 (diff) | |
| download | linux-936b33f7243fa1e54c8f4f2febd3472cc00e66fd.tar.xz | |
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>
Diffstat (limited to 'drivers/block/brd.c')
| -rw-r--r-- | drivers/block/brd.c | 6 |
1 files changed, 6 insertions, 0 deletions
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 @@ -153,6 +153,12 @@ 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, * so will this have to. |