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-rw-r--r--mm/memory-failure.c72
1 files changed, 40 insertions, 32 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index ca5acee53b7a..2fcca6b0e005 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -184,8 +184,8 @@ static int kill_proc(struct task_struct *t, unsigned long addr, int trapno,
struct siginfo si;
int ret;
- pr_err("MCE %#lx: Killing %s:%d due to hardware memory corruption\n",
- pfn, t->comm, t->pid);
+ pr_err("Memory failure: %#lx: Killing %s:%d due to hardware memory corruption\n",
+ pfn, t->comm, t->pid);
si.si_signo = SIGBUS;
si.si_errno = 0;
si.si_addr = (void *)addr;
@@ -208,7 +208,7 @@ static int kill_proc(struct task_struct *t, unsigned long addr, int trapno,
ret = send_sig_info(SIGBUS, &si, t); /* synchronous? */
}
if (ret < 0)
- pr_info("MCE: Error sending signal to %s:%d: %d\n",
+ pr_info("Memory failure: Error sending signal to %s:%d: %d\n",
t->comm, t->pid, ret);
return ret;
}
@@ -289,7 +289,7 @@ static void add_to_kill(struct task_struct *tsk, struct page *p,
} else {
tk = kmalloc(sizeof(struct to_kill), GFP_ATOMIC);
if (!tk) {
- pr_err("MCE: Out of memory while machine check handling\n");
+ pr_err("Memory failure: Out of memory while machine check handling\n");
return;
}
}
@@ -303,7 +303,7 @@ static void add_to_kill(struct task_struct *tsk, struct page *p,
* a SIGKILL because the error is not contained anymore.
*/
if (tk->addr == -EFAULT) {
- pr_info("MCE: Unable to find user space address %lx in %s\n",
+ pr_info("Memory failure: Unable to find user space address %lx in %s\n",
page_to_pfn(p), tsk->comm);
tk->addr_valid = 0;
}
@@ -334,7 +334,7 @@ static void kill_procs(struct list_head *to_kill, int forcekill, int trapno,
* signal and then access the memory. Just kill it.
*/
if (fail || tk->addr_valid == 0) {
- pr_err("MCE %#lx: forcibly killing %s:%d because of failure to unmap corrupted page\n",
+ pr_err("Memory failure: %#lx: forcibly killing %s:%d because of failure to unmap corrupted page\n",
pfn, tk->tsk->comm, tk->tsk->pid);
force_sig(SIGKILL, tk->tsk);
}
@@ -347,7 +347,7 @@ static void kill_procs(struct list_head *to_kill, int forcekill, int trapno,
*/
else if (kill_proc(tk->tsk, tk->addr, trapno,
pfn, page, flags) < 0)
- pr_err("MCE %#lx: Cannot send advisory machine check signal to %s:%d\n",
+ pr_err("Memory failure: %#lx: Cannot send advisory machine check signal to %s:%d\n",
pfn, tk->tsk->comm, tk->tsk->pid);
}
put_task_struct(tk->tsk);
@@ -559,7 +559,7 @@ static int me_kernel(struct page *p, unsigned long pfn)
*/
static int me_unknown(struct page *p, unsigned long pfn)
{
- pr_err("MCE %#lx: Unknown page state\n", pfn);
+ pr_err("Memory failure: %#lx: Unknown page state\n", pfn);
return MF_FAILED;
}
@@ -604,11 +604,12 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
if (mapping->a_ops->error_remove_page) {
err = mapping->a_ops->error_remove_page(mapping, p);
if (err != 0) {
- pr_info("MCE %#lx: Failed to punch page: %d\n",
+ pr_info("Memory failure: %#lx: Failed to punch page: %d\n",
pfn, err);
} else if (page_has_private(p) &&
!try_to_release_page(p, GFP_NOIO)) {
- pr_info("MCE %#lx: failed to release buffers\n", pfn);
+ pr_info("Memory failure: %#lx: failed to release buffers\n",
+ pfn);
} else {
ret = MF_RECOVERED;
}
@@ -620,7 +621,8 @@ static int me_pagecache_clean(struct page *p, unsigned long pfn)
if (invalidate_inode_page(p))
ret = MF_RECOVERED;
else
- pr_info("MCE %#lx: Failed to invalidate\n", pfn);
+ pr_info("Memory failure: %#lx: Failed to invalidate\n",
+ pfn);
}
return ret;
}
@@ -833,7 +835,7 @@ static void action_result(unsigned long pfn, enum mf_action_page_type type,
{
trace_memory_failure_event(pfn, type, result);
- pr_err("MCE %#lx: recovery action for %s: %s\n",
+ pr_err("Memory failure: %#lx: recovery action for %s: %s\n",
pfn, action_page_types[type], action_name[result]);
}
@@ -849,7 +851,7 @@ static int page_action(struct page_state *ps, struct page *p,
if (ps->action == me_swapcache_dirty && result == MF_DELAYED)
count--;
if (count != 0) {
- pr_err("MCE %#lx: %s still referenced by %d users\n",
+ pr_err("Memory failure: %#lx: %s still referenced by %d users\n",
pfn, action_page_types[ps->type], count);
result = MF_FAILED;
}
@@ -882,7 +884,7 @@ int get_hwpoison_page(struct page *page)
* tries to touch the "partially handled" page.
*/
if (!PageAnon(head)) {
- pr_err("MCE: %#lx: non anonymous thp\n",
+ pr_err("Memory failure: %#lx: non anonymous thp\n",
page_to_pfn(page));
return 0;
}
@@ -892,7 +894,8 @@ int get_hwpoison_page(struct page *page)
if (head == compound_head(page))
return 1;
- pr_info("MCE: %#lx cannot catch tail\n", page_to_pfn(page));
+ pr_info("Memory failure: %#lx cannot catch tail\n",
+ page_to_pfn(page));
put_page(head);
}
@@ -931,12 +934,13 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
return SWAP_SUCCESS;
if (PageKsm(p)) {
- pr_err("MCE %#lx: can't handle KSM pages.\n", pfn);
+ pr_err("Memory failure: %#lx: can't handle KSM pages.\n", pfn);
return SWAP_FAIL;
}
if (PageSwapCache(p)) {
- pr_err("MCE %#lx: keeping poisoned page in swap cache\n", pfn);
+ pr_err("Memory failure: %#lx: keeping poisoned page in swap cache\n",
+ pfn);
ttu |= TTU_IGNORE_HWPOISON;
}
@@ -954,7 +958,7 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
} else {
kill = 0;
ttu |= TTU_IGNORE_HWPOISON;
- pr_info("MCE %#lx: corrupted page was clean: dropped without side effects\n",
+ pr_info("Memory failure: %#lx: corrupted page was clean: dropped without side effects\n",
pfn);
}
}
@@ -972,7 +976,7 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
ret = try_to_unmap(hpage, ttu);
if (ret != SWAP_SUCCESS)
- pr_err("MCE %#lx: failed to unmap page (mapcount=%d)\n",
+ pr_err("Memory failure: %#lx: failed to unmap page (mapcount=%d)\n",
pfn, page_mapcount(hpage));
/*
@@ -1040,14 +1044,16 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
panic("Memory failure from trap %d on page %lx", trapno, pfn);
if (!pfn_valid(pfn)) {
- pr_err("MCE %#lx: memory outside kernel control\n", pfn);
+ pr_err("Memory failure: %#lx: memory outside kernel control\n",
+ pfn);
return -ENXIO;
}
p = pfn_to_page(pfn);
orig_head = hpage = compound_head(p);
if (TestSetPageHWPoison(p)) {
- pr_err("MCE %#lx: already hardware poisoned\n", pfn);
+ pr_err("Memory failure: %#lx: already hardware poisoned\n",
+ pfn);
return 0;
}
@@ -1112,9 +1118,11 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
if (!PageAnon(hpage) || unlikely(split_huge_page(hpage))) {
unlock_page(hpage);
if (!PageAnon(hpage))
- pr_err("MCE: %#lx: non anonymous thp\n", pfn);
+ pr_err("Memory failure: %#lx: non anonymous thp\n",
+ pfn);
else
- pr_err("MCE: %#lx: thp split failed\n", pfn);
+ pr_err("Memory failure: %#lx: thp split failed\n",
+ pfn);
if (TestClearPageHWPoison(p))
num_poisoned_pages_sub(nr_pages);
put_hwpoison_page(p);
@@ -1178,7 +1186,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
* unpoison always clear PG_hwpoison inside page lock
*/
if (!PageHWPoison(p)) {
- pr_err("MCE %#lx: just unpoisoned\n", pfn);
+ pr_err("Memory failure: %#lx: just unpoisoned\n", pfn);
num_poisoned_pages_sub(nr_pages);
unlock_page(hpage);
put_hwpoison_page(hpage);
@@ -1395,25 +1403,25 @@ int unpoison_memory(unsigned long pfn)
page = compound_head(p);
if (!PageHWPoison(p)) {
- unpoison_pr_info("MCE: Page was already unpoisoned %#lx\n",
+ unpoison_pr_info("Unpoison: Page was already unpoisoned %#lx\n",
pfn, &unpoison_rs);
return 0;
}
if (page_count(page) > 1) {
- unpoison_pr_info("MCE: Someone grabs the hwpoison page %#lx\n",
+ unpoison_pr_info("Unpoison: Someone grabs the hwpoison page %#lx\n",
pfn, &unpoison_rs);
return 0;
}
if (page_mapped(page)) {
- unpoison_pr_info("MCE: Someone maps the hwpoison page %#lx\n",
+ unpoison_pr_info("Unpoison: Someone maps the hwpoison page %#lx\n",
pfn, &unpoison_rs);
return 0;
}
if (page_mapping(page)) {
- unpoison_pr_info("MCE: the hwpoison page has non-NULL mapping %#lx\n",
+ unpoison_pr_info("Unpoison: the hwpoison page has non-NULL mapping %#lx\n",
pfn, &unpoison_rs);
return 0;
}
@@ -1424,7 +1432,7 @@ int unpoison_memory(unsigned long pfn)
* In such case, we yield to memory_failure() and make unpoison fail.
*/
if (!PageHuge(page) && PageTransHuge(page)) {
- unpoison_pr_info("MCE: Memory failure is now running on %#lx\n",
+ unpoison_pr_info("Unpoison: Memory failure is now running on %#lx\n",
pfn, &unpoison_rs);
return 0;
}
@@ -1439,13 +1447,13 @@ int unpoison_memory(unsigned long pfn)
* to the end.
*/
if (PageHuge(page)) {
- unpoison_pr_info("MCE: Memory failure is now running on free hugepage %#lx\n",
+ unpoison_pr_info("Unpoison: Memory failure is now running on free hugepage %#lx\n",
pfn, &unpoison_rs);
return 0;
}
if (TestClearPageHWPoison(p))
num_poisoned_pages_dec();
- unpoison_pr_info("MCE: Software-unpoisoned free page %#lx\n",
+ unpoison_pr_info("Unpoison: Software-unpoisoned free page %#lx\n",
pfn, &unpoison_rs);
return 0;
}
@@ -1458,7 +1466,7 @@ int unpoison_memory(unsigned long pfn)
* the free buddy page pool.
*/
if (TestClearPageHWPoison(page)) {
- unpoison_pr_info("MCE: Software-unpoisoned page %#lx\n",
+ unpoison_pr_info("Unpoison: Software-unpoisoned page %#lx\n",
pfn, &unpoison_rs);
num_poisoned_pages_sub(nr_pages);
freeit = 1;
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