From: akpm@linux-foundation.org
To: aneesh.kumar@linux.ibm.com, aneesh.kumar@linux.vnet.ibm.com,
cai@lca.pw, dave.hansen@intel.com, david@redhat.com,
mhocko@kernel.org, mike.kravetz@oracle.com,
mm-commits@vger.kernel.org, naoya.horiguchi@nec.com,
osalvador@suse.com, tony.luck@intel.com, zeil@yandex-team.ru
Subject: + mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch added to -mm tree
Date: Thu, 06 Aug 2020 18:06:58 -0700 [thread overview]
Message-ID: <20200807010658.eBQhuo6Bc%akpm@linux-foundation.org> (raw)
The patch titled
Subject: mm,hwpoison-inject: don't pin for hwpoison_filter
has been added to the -mm tree. Its filename is
mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Naoya Horiguchi <naoya.horiguchi@nec.com>
Subject: mm,hwpoison-inject: don't pin for hwpoison_filter
Another memory error injection interface debugfs:hwpoison/corrupt-pfn also
takes bogus refcount for hwpoison_filter(). It's justified because this
does a coarse filter, expecting that memory_failure() redoes the check for
sure.
Link: http://lkml.kernel.org/r/20200806184923.7007-4-nao.horiguchi@gmail.com
Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Oscar Salvador <osalvador@suse.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Dmitry Yakunin <zeil@yandex-team.ru>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/hwpoison-inject.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
--- a/mm/hwpoison-inject.c~mmhwpoison-inject-dont-pin-for-hwpoison_filter
+++ a/mm/hwpoison-inject.c
@@ -26,11 +26,6 @@ static int hwpoison_inject(void *data, u
p = pfn_to_page(pfn);
hpage = compound_head(p);
- /*
- * This implies unable to support free buddy pages.
- */
- if (!get_hwpoison_page(p))
- return 0;
if (!hwpoison_filter_enable)
goto inject;
@@ -40,23 +35,20 @@ static int hwpoison_inject(void *data, u
* This implies unable to support non-LRU pages.
*/
if (!PageLRU(hpage) && !PageHuge(p))
- goto put_out;
+ return 0;
/*
- * do a racy check with elevated page count, to make sure PG_hwpoison
- * will only be set for the targeted owner (or on a free page).
+ * do a racy check to make sure PG_hwpoison will only be set for
+ * the targeted owner (or on a free page).
* memory_failure() will redo the check reliably inside page lock.
*/
err = hwpoison_filter(hpage);
if (err)
- goto put_out;
+ return 0;
inject:
pr_info("Injecting memory failure at pfn %#lx\n", pfn);
- return memory_failure(pfn, MF_COUNT_INCREASED);
-put_out:
- put_hwpoison_page(p);
- return 0;
+ return memory_failure(pfn, 0);
}
static int hwpoison_unpoison(void *data, u64 val)
_
Patches currently in -mm which might be from naoya.horiguchi@nec.com are
mmhwpoison-cleanup-unused-pagehuge-check.patch
mm-hwpoison-remove-recalculating-hpage.patch
mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch
mmhwpoison-introduce-mf_msg_unsplit_thp.patch
mmhwpoison-double-check-page-count-in-__get_any_page.patch
next reply other threads:[~2020-08-07 1:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-07 1:06 akpm [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-09-22 17:00 + mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch added to -mm tree akpm
2020-07-24 4:14 incoming Andrew Morton
2020-07-31 20:05 ` + mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch added to -mm tree Andrew Morton
2020-07-03 22:14 incoming Andrew Morton
2020-07-16 21:45 ` + mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch added to -mm tree Andrew Morton
2020-06-24 19:19 akpm
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