lkml.org 
[lkml]   [2022]   [Feb]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 2/2] mm/hwpoison: Add in-use hugepage hwpoison filter judgement
Date
After successfully obtaining the reference count of the huge
page, it is still necessary to call hwpoison_filter() to make a
filter judgement, otherwise the filter hugepage will be unmaped
and the related process may be killed.

Signed-off-by: luofei <luofei@unicloud.com>
---
mm/memory-failure.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 59d6d939a752..17a7b0a94ab9 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1548,6 +1548,17 @@ static int memory_failure_hugetlb(unsigned long pfn, int flags)
lock_page(head);
page_flags = head->flags;

+ if (hwpoison_filter(p)) {
+ if (TestClearPageHWPoison(head))
+ num_poisoned_pages_dec();
+ put_page(p);
+ if (flags & MF_MCE_HANDLE)
+ res = -EHWPOISON;
+ else
+ res = 0;
+ goto out;
+ }
+
/*
* TODO: hwpoison for pud-sized hugetlb doesn't work right now, so
* simply disable it. In order to make it work properly, we need
--
2.27.0
\
 
 \ /
  Last update: 2022-02-21 03:50    [W:1.269 / U:0.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site