From: qiang.zhang@windriver.com
To: mgorman@techsingularity.net, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mm/page_alloc: avoid hard lockups in __alloc_pages_bulk()
Date: Sat, 10 Jul 2021 19:29:29 +0800 [thread overview]
Message-ID: <20210710112929.232268-1-qiang.zhang@windriver.com> (raw)
From: Zqiang <qiang.zhang@windriver.com>
The __alloc_pages_bulk() mainly used for batch allocation of
order-0 pages, in the case of holding pagesets.lock, if too
many pages are required, maybe trigger hard lockup watchdog.
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
---
mm/page_alloc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d6e94cc8066c..1127db25507f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5315,6 +5315,8 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid,
else
page_array[nr_populated] = page;
nr_populated++;
+
+ touch_nmi_watchdog();
}
local_unlock_irqrestore(&pagesets.lock, flags);
--
2.25.1
next reply other threads:[~2021-07-10 11:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-10 11:29 qiang.zhang [this message]
2021-07-10 18:46 ` [PATCH] mm/page_alloc: avoid hard lockups in __alloc_pages_bulk() Andrew Morton
2021-07-10 21:10 ` Matthew Wilcox
2021-07-10 22:57 ` Zhang, Qiang
2021-07-15 8:35 ` Mel Gorman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210710112929.232268-1-qiang.zhang@windriver.com \
--to=qiang.zhang@windriver.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@techsingularity.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).