From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Wed, 17 Jun 2020 22:20:26 +0000 (-0400)
Subject: bcachefs: Add a kthread_should_stop() check to allocator thread
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=eff508b459fb90682c7a5c4e6d2de0b1d18217e4;p=linux.git

bcachefs: Add a kthread_should_stop() check to allocator thread

Turns out it's possible during shutdown for the allocator to get stuck
spinning on bch2_invalidate_buckets() without hitting any of the other
checks.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c
index 93ee5cdfbe354..98dd4995e528a 100644
--- a/fs/bcachefs/alloc_background.c
+++ b/fs/bcachefs/alloc_background.c
@@ -1104,6 +1104,8 @@ static int bch2_allocator_thread(void *arg)
 
 	while (1) {
 		cond_resched();
+		if (kthread_should_stop())
+			break;
 
 		pr_debug("discarding %zu invalidated buckets",
 			 fifo_used(&ca->free_inc));