From: akpm@linux-foundation.org
To: mm-commits@vger.kernel.org, zeil@yandex-team.ru,
tony.luck@intel.com, osalvador@suse.com, naoya.horiguchi@nec.com,
mike.kravetz@oracle.com, mhocko@kernel.org, david@redhat.com,
dave.hansen@intel.com, cai@lca.pw, aris@ruivo.org,
aneesh.kumar@linux.vnet.ibm.com, aneesh.kumar@linux.ibm.com,
osalvador@suse.de
Subject: + mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.patch added to -mm tree
Date: Tue, 22 Sep 2020 10:00:27 -0700 [thread overview]
Message-ID: <20200922170027.TEf7D%akpm@linux-foundation.org> (raw)
The patch titled
Subject: mm,hwpoison: unify THP handling for hard and soft offline
has been added to the -mm tree. Its filename is
mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.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: Oscar Salvador <osalvador@suse.de>
Subject: mm,hwpoison: unify THP handling for hard and soft offline
Place the THP's page handling in a helper and use it from both hard and
soft-offline machinery, so we get rid of some duplicated code.
Link: https://lkml.kernel.org/r/20200922135650.1634-8-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Aristeu Rozanski <aris@ruivo.org>
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: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Oscar Salvador <osalvador@suse.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/memory-failure.c | 48 +++++++++++++++++++-----------------------
1 file changed, 22 insertions(+), 26 deletions(-)
--- a/mm/memory-failure.c~mmhwpoison-unify-thp-handling-for-hard-and-soft-offline
+++ a/mm/memory-failure.c
@@ -1102,6 +1102,25 @@ static int identify_page_state(unsigned
return page_action(ps, p, pfn);
}
+static int try_to_split_thp_page(struct page *page, const char *msg)
+{
+ lock_page(page);
+ if (!PageAnon(page) || unlikely(split_huge_page(page))) {
+ unsigned long pfn = page_to_pfn(page);
+
+ unlock_page(page);
+ if (!PageAnon(page))
+ pr_info("%s: %#lx: non anonymous thp\n", msg, pfn);
+ else
+ pr_info("%s: %#lx: thp split failed\n", msg, pfn);
+ put_page(page);
+ return -EBUSY;
+ }
+ unlock_page(page);
+
+ return 0;
+}
+
static int memory_failure_hugetlb(unsigned long pfn, int flags)
{
struct page *p = pfn_to_page(pfn);
@@ -1324,21 +1343,8 @@ int memory_failure(unsigned long pfn, in
}
if (PageTransHuge(hpage)) {
- lock_page(p);
- if (!PageAnon(p) || unlikely(split_huge_page(p))) {
- unlock_page(p);
- if (!PageAnon(p))
- pr_err("Memory failure: %#lx: non anonymous thp\n",
- pfn);
- else
- pr_err("Memory failure: %#lx: thp split failed\n",
- pfn);
- if (TestClearPageHWPoison(p))
- num_poisoned_pages_dec();
- put_page(p);
+ if (try_to_split_thp_page(p, "Memory Failure") < 0)
return -EBUSY;
- }
- unlock_page(p);
VM_BUG_ON_PAGE(!page_count(p), p);
}
@@ -1855,19 +1861,9 @@ static int soft_offline_in_use_page(stru
int mt;
struct page *hpage = compound_head(page);
- if (!PageHuge(page) && PageTransHuge(hpage)) {
- lock_page(page);
- if (!PageAnon(page) || unlikely(split_huge_page(page))) {
- unlock_page(page);
- if (!PageAnon(page))
- pr_info("soft offline: %#lx: non anonymous thp\n", page_to_pfn(page));
- else
- pr_info("soft offline: %#lx: thp split failed\n", page_to_pfn(page));
- put_page(page);
+ if (!PageHuge(page) && PageTransHuge(hpage))
+ if (try_to_split_thp_page(page, "soft offline") < 0)
return -EBUSY;
- }
- unlock_page(page);
- }
/*
* Setting MIGRATE_ISOLATE here ensures that the page will be linked
_
Patches currently in -mm which might be from osalvador@suse.de are
mmhwpoison-unexport-get_hwpoison_page-and-make-it-static.patch
mmhwpoison-refactor-madvise_inject_error.patch
mmhwpoison-kill-put_hwpoison_page.patch
mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.patch
mmhwpoison-rework-soft-offline-for-free-pages.patch
mmhwpoison-rework-soft-offline-for-in-use-pages.patch
mmhwpoison-refactor-soft_offline_huge_page-and-__soft_offline_page.patch
mmhwpoison-return-0-if-the-page-is-already-poisoned-in-soft-offline.patch
mmhwpoison-try-to-narrow-window-race-for-free-pages.patch
mmhwpoison-take-free-pages-off-the-buddy-freelists.patch
mmhwpoison-drain-pcplists-before-bailing-out-for-non-buddy-zero-refcount-page.patch
mmhwpoison-drop-unneeded-pcplist-draining.patch
mmhwpoison-remove-stale-code.patch
next reply other threads:[~2020-09-22 17:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 17:00 akpm [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-08-07 1:07 + mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.patch added to -mm tree akpm
2020-07-24 4:14 incoming Andrew Morton
2020-07-31 20:06 ` + mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.patch added to -mm tree Andrew Morton
2020-07-03 22:14 incoming Andrew Morton
2020-07-16 21:46 ` + mmhwpoison-unify-thp-handling-for-hard-and-soft-offline.patch added to -mm tree Andrew Morton
2020-06-24 19:19 akpm
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