From: Liu Song <fishland@aliyun.com>
To: gregkh@linuxfoundation.org, jroedel@suse.de,
dave.hansen@linux.intel.com, tglx@linutronix.de
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, liu.song11@zte.com.cn
Subject: [RFC PATCH] mm/vmalloc: make sure to traverse from the beginning when overflow occur
Date: Sun, 12 Apr 2020 22:38:03 +0800 [thread overview]
Message-ID: <20200412143803.43931-1-fishland@aliyun.com> (raw)
From: Liu Song <liu.song11@zte.com.cn>
If overflow, should ensure that "free_vmap_cache" is set to NULL,
so as to ensure that it can be traversed from the beginning.
Signed-off-by: Liu Song <liu.song11@zte.com.cn>
---
mm/vmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d8e877365f9f..2638a20d36ce 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -441,7 +441,7 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
if (!free_vmap_cache ||
size < cached_hole_size ||
vstart < cached_vstart ||
- align < cached_align) {
+ align < cached_align || purged) {
nocache:
cached_hole_size = 0;
free_vmap_cache = NULL;
--
2.20.1
next reply other threads:[~2020-04-12 14:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-12 14:38 Liu Song [this message]
2020-04-13 15:02 ` Dave Hansen
2020-04-14 14:54 ` fishland
2020-04-14 19:02 ` Uladzislau Rezki
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=20200412143803.43931-1-fishland@aliyun.com \
--to=fishland@aliyun.com \
--cc=dave.hansen@linux.intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=jroedel@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=liu.song11@zte.com.cn \
--cc=tglx@linutronix.de \
/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