From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Sat, 25 Jan 2025 02:29:24 +0000 (-0500)
Subject: bcachefs: Journal writes are now IOPRIO_CLASS_RT
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=75474a54ed354ab7b00b8557ca7a166871473848;p=users%2Fwilly%2Fpagecache.git

bcachefs: Journal writes are now IOPRIO_CLASS_RT

System performance is particularly sensitive to journal write latency,
the number of outstanding journal writes is bounded and we can't issue
journal flushes until other journal writes have completed.

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

diff --git a/fs/bcachefs/journal_io.c b/fs/bcachefs/journal_io.c
index 7f2efe85a8052..11c39e0c34f4c 100644
--- a/fs/bcachefs/journal_io.c
+++ b/fs/bcachefs/journal_io.c
@@ -17,6 +17,7 @@
 #include "sb-clean.h"
 #include "trace.h"
 
+#include <linux/ioprio.h>
 #include <linux/string_choices.h>
 
 void bch2_journal_pos_from_member_info_set(struct bch_fs *c)
@@ -1763,6 +1764,7 @@ static CLOSURE_CALLBACK(journal_write_submit)
 		bio->bi_iter.bi_sector	= ptr->offset;
 		bio->bi_end_io		= journal_write_endio;
 		bio->bi_private		= ca;
+		bio->bi_ioprio		= IOPRIO_PRIO_VALUE(IOPRIO_CLASS_RT, 0);
 
 		BUG_ON(bio->bi_iter.bi_sector == ca->prev_journal_sector);
 		ca->prev_journal_sector = bio->bi_iter.bi_sector;