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Message-ID: <BLU436-SMTP12740A47B6EBB7DF2F12A9280700@phx.gbl>
Date: Mon, 10 Aug 2015 19:28:23 +0800
From: Wanpeng Li <wanpeng.li@...mail.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: Naoya Horiguchi <n-horiguchi@...jp.nec.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, Wanpeng Li <wanpeng.li@...mail.com>
Subject: [PATCH v2 5/5] mm/hwpoison: replace most of put_page in memory error handling by put_hwpoison_page
Replace most of put_page in memory error handling by put_hwpoison_page,
except the ones at the front of soft_offline_page since the page maybe
THP page and the get refcount in madvise_hwpoison is against the single
4KB page instead of the logic in get_hwpoison_page.
Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com>
---
mm/memory-failure.c | 28 +++++++++++++---------------
1 files changed, 13 insertions(+), 15 deletions(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index fa9aa21..6179fc1 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1159,9 +1159,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
pr_err("MCE: %#lx: thp split failed\n", pfn);
if (TestClearPageHWPoison(p))
atomic_long_sub(nr_pages, &num_poisoned_pages);
- put_page(p);
- if (p != hpage)
- put_page(hpage);
+ put_hwpoison_page(p);
return -EBUSY;
}
VM_BUG_ON_PAGE(!page_count(p), p);
@@ -1222,14 +1220,14 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
printk(KERN_ERR "MCE %#lx: just unpoisoned\n", pfn);
atomic_long_sub(nr_pages, &num_poisoned_pages);
unlock_page(hpage);
- put_page(hpage);
+ put_hwpoison_page(hpage);
return 0;
}
if (hwpoison_filter(p)) {
if (TestClearPageHWPoison(p))
atomic_long_sub(nr_pages, &num_poisoned_pages);
unlock_page(hpage);
- put_page(hpage);
+ put_hwpoison_page(hpage);
return 0;
}
@@ -1243,7 +1241,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
if (PageHuge(p) && PageTail(p) && TestSetPageHWPoison(hpage)) {
action_result(pfn, MF_MSG_POISONED_HUGE, MF_IGNORED);
unlock_page(hpage);
- put_page(hpage);
+ put_hwpoison_page(hpage);
return 0;
}
/*
@@ -1477,9 +1475,9 @@ int unpoison_memory(unsigned long pfn)
}
unlock_page(page);
- put_page(page);
+ put_hwpoison_page(page);
if (freeit && !(pfn == my_zero_pfn(0) && page_count(p) == 1))
- put_page(page);
+ put_hwpoison_page(page);
return 0;
}
@@ -1539,7 +1537,7 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
/*
* Try to free it.
*/
- put_page(page);
+ put_hwpoison_page(page);
shake_page(page, 1);
/*
@@ -1548,7 +1546,7 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags)
ret = __get_any_page(page, pfn, 0);
if (!PageLRU(page)) {
/* Drop page reference which is from __get_any_page() */
- put_page(page);
+ put_hwpoison_page(page);
pr_info("soft_offline: %#lx: unknown non LRU page type %lx\n",
pfn, page->flags);
return -EIO;
@@ -1571,7 +1569,7 @@ static int soft_offline_huge_page(struct page *page, int flags)
lock_page(hpage);
if (PageHWPoison(hpage)) {
unlock_page(hpage);
- put_page(hpage);
+ put_hwpoison_page(hpage);
pr_info("soft offline: %#lx hugepage already poisoned\n", pfn);
return -EBUSY;
}
@@ -1582,7 +1580,7 @@ static int soft_offline_huge_page(struct page *page, int flags)
* get_any_page() and isolate_huge_page() takes a refcount each,
* so need to drop one here.
*/
- put_page(hpage);
+ put_hwpoison_page(hpage);
if (!ret) {
pr_info("soft offline: %#lx hugepage failed to isolate\n", pfn);
return -EBUSY;
@@ -1631,7 +1629,7 @@ static int __soft_offline_page(struct page *page, int flags)
wait_on_page_writeback(page);
if (PageHWPoison(page)) {
unlock_page(page);
- put_page(page);
+ put_hwpoison_page(page);
pr_info("soft offline: %#lx page already poisoned\n", pfn);
return -EBUSY;
}
@@ -1646,7 +1644,7 @@ static int __soft_offline_page(struct page *page, int flags)
* would need to fix isolation locking first.
*/
if (ret == 1) {
- put_page(page);
+ put_hwpoison_page(page);
pr_info("soft_offline: %#lx: invalidated\n", pfn);
SetPageHWPoison(page);
atomic_long_inc(&num_poisoned_pages);
@@ -1663,7 +1661,7 @@ static int __soft_offline_page(struct page *page, int flags)
* Drop page reference which is came from get_any_page()
* successful isolate_lru_page() already took another one.
*/
- put_page(page);
+ put_hwpoison_page(page);
if (!ret) {
LIST_HEAD(pagelist);
inc_zone_page_state(page, NR_ISOLATED_ANON +
--
1.7.1
--
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