linux-kernel - [PATCH] block: Set default value to bdi->io

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Message-ID: <878sdxosem.fsf@mail.parknet.co.jp>
Date:   Sun, 30 Aug 2020 10:04:49 +0900
From:   OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] block: Set default value to bdi->io_pages instead of zero

This may not enough to guarantee ->io_pages is not zero though,
instead of leaving ->io_pages as zero, this initializing ->io_pages to
sane value. (maybe some part of NVMe driver seems to be)

Signed-off-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
---
 block/blk-core.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/block/blk-core.c b/block/blk-core.c
index 03252af..619a3dc 100644
--- a/block/blk-core.c	2020-08-30 06:47:21.221530450 +0900
+++ b/block/blk-core.c	2020-08-30 06:48:05.805875540 +0900
@@ -526,6 +526,7 @@ struct request_queue *__blk_alloc_queue(
 		goto fail_stats;
 
 	q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES;
+	q->backing_dev_info->io_pages = VM_READAHEAD_PAGES;
 	q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
 	q->node = node_id;
 
_

-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>