From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Thu, 29 Apr 2021 20:55:26 +0000 (-0400)
Subject: bcachefs: Mark newly allocated btree nodes as accessed
X-Git-Tag: v6.7-rc1~201^2~1595
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e68031fb468aff9963d344d04e2de8824c83c8ae;p=users%2Fdwmw2%2Flinux.git

bcachefs: Mark newly allocated btree nodes as accessed

This was a major oversight - this means under memory pressure we can end
up reading in a btree node, then having it evicted before we get to use
it.

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

diff --git a/fs/bcachefs/btree_cache.c b/fs/bcachefs/btree_cache.c
index 85c19e4e52168..a13e5eef868ee 100644
--- a/fs/bcachefs/btree_cache.c
+++ b/fs/bcachefs/btree_cache.c
@@ -590,6 +590,7 @@ out:
 	b->sib_u64s[1]		= 0;
 	b->whiteout_u64s	= 0;
 	bch2_btree_keys_init(b);
+	set_btree_node_accessed(b);
 
 	bch2_time_stats_update(&c->times[BCH_TIME_btree_node_mem_alloc],
 			       start_time);