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mm: memory-failure: convert to pr_fmt()

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Use pr_fmt to prefix all pr_<level> output, but unpoison_memory() and
soft_offline_page() are used by error injection, which have own prefixes
like "Unpoison:" and "soft offline:", meanwhile, soft_offline_page() could
be used by memory hotremove, so reset pr_fmt before unpoison_pr_info
definition to keep the original output for them.

[wangkefeng.wang@huawei.com: v3]
  Link: https://lkml.kernel.org/r/20220729031919.72331-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20220726081046.10742-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kefeng Wang 2022-07-26 16:10:46 +08:00 committed by akpm
parent 07252dfea2
commit 96f96763de
1 changed files with 28 additions and 30 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

58
mm/memory-failure.c
View file

@ -33,6 +33,9 @@
* are rare we hope to get away with this. This avoids impacting the core * are rare we hope to get away with this. This avoids impacting the core
* VM. * VM.
*/ */
#define pr_fmt(fmt) "Memory failure: " fmt
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/page-flags.h> #include <linux/page-flags.h>
@ -252,7 +255,7 @@ static int kill_proc(struct to_kill *tk, unsigned long pfn, int flags)
short addr_lsb = tk->size_shift; short addr_lsb = tk->size_shift;
int ret = 0; int ret = 0;
pr_err("Memory failure: %#lx: Sending SIGBUS to %s:%d due to hardware memory corruption\n", pr_err("%#lx: Sending SIGBUS to %s:%d due to hardware memory corruption\n",
pfn, t->comm, t->pid); pfn, t->comm, t->pid);
if ((flags & MF_ACTION_REQUIRED) && (t == current)) if ((flags & MF_ACTION_REQUIRED) && (t == current))
@ -270,7 +273,7 @@ static int kill_proc(struct to_kill *tk, unsigned long pfn, int flags)
ret = send_sig_mceerr(BUS_MCEERR_AO, (void __user *)tk->addr, ret = send_sig_mceerr(BUS_MCEERR_AO, (void __user *)tk->addr,
addr_lsb, t); /* synchronous? */ addr_lsb, t); /* synchronous? */
if (ret < 0) if (ret < 0)
pr_info("Memory failure: Error sending signal to %s:%d: %d\n", pr_info("Error sending signal to %s:%d: %d\n",
t->comm, t->pid, ret); t->comm, t->pid, ret);
return ret; return ret;
} }
@ -352,7 +355,7 @@ static void add_to_kill(struct task_struct *tsk, struct page *p,
tk = kmalloc(sizeof(struct to_kill), GFP_ATOMIC); tk = kmalloc(sizeof(struct to_kill), GFP_ATOMIC);
if (!tk) { if (!tk) {
pr_err("Memory failure: Out of memory while machine check handling\n"); pr_err("Out of memory while machine check handling\n");
return; return;
} }
@ -379,7 +382,7 @@ static void add_to_kill(struct task_struct *tsk, struct page *p,
* has a mapping for the page. * has a mapping for the page.
*/ */
if (tk->addr == -EFAULT) { if (tk->addr == -EFAULT) {
pr_info("Memory failure: Unable to find user space address %lx in %s\n", pr_info("Unable to find user space address %lx in %s\n",
page_to_pfn(p), tsk->comm); page_to_pfn(p), tsk->comm);
} else if (tk->size_shift == 0) { } else if (tk->size_shift == 0) {
kfree(tk); kfree(tk);
@ -412,7 +415,7 @@ static void kill_procs(struct list_head *to_kill, int forcekill, bool fail,
* signal and then access the memory. Just kill it. * signal and then access the memory. Just kill it.
*/ */
if (fail || tk->addr == -EFAULT) { if (fail || tk->addr == -EFAULT) {
pr_err("Memory failure: %#lx: forcibly killing %s:%d because of failure to unmap corrupted page\n", pr_err("%#lx: forcibly killing %s:%d because of failure to unmap corrupted page\n",
pfn, tk->tsk->comm, tk->tsk->pid); pfn, tk->tsk->comm, tk->tsk->pid);
do_send_sig_info(SIGKILL, SEND_SIG_PRIV, do_send_sig_info(SIGKILL, SEND_SIG_PRIV,
tk->tsk, PIDTYPE_PID); tk->tsk, PIDTYPE_PID);
@ -425,7 +428,7 @@ static void kill_procs(struct list_head *to_kill, int forcekill, bool fail,
* process anyways. * process anyways.
*/ */
else if (kill_proc(tk, pfn, flags) < 0) else if (kill_proc(tk, pfn, flags) < 0)
pr_err("Memory failure: %#lx: Cannot send advisory machine check signal to %s:%d\n", pr_err("%#lx: Cannot send advisory machine check signal to %s:%d\n",
pfn, tk->tsk->comm, tk->tsk->pid); pfn, tk->tsk->comm, tk->tsk->pid);
} }
put_task_struct(tk->tsk); put_task_struct(tk->tsk);
@ -816,12 +819,10 @@ static int truncate_error_page(struct page *p, unsigned long pfn,
int err = mapping->a_ops->error_remove_page(mapping, p); int err = mapping->a_ops->error_remove_page(mapping, p);
if (err != 0) { if (err != 0) {
pr_info("Memory failure: %#lx: Failed to punch page: %d\n", pr_info("%#lx: Failed to punch page: %d\n", pfn, err);
pfn, err);
} else if (page_has_private(p) && } else if (page_has_private(p) &&
!try_to_release_page(p, GFP_NOIO)) { !try_to_release_page(p, GFP_NOIO)) {
pr_info("Memory failure: %#lx: failed to release buffers\n", pr_info("%#lx: failed to release buffers\n", pfn);
pfn);
} else { } else {
ret = MF_RECOVERED; ret = MF_RECOVERED;
} }
@ -833,8 +834,7 @@ static int truncate_error_page(struct page *p, unsigned long pfn,
if (invalidate_inode_page(p)) if (invalidate_inode_page(p))
ret = MF_RECOVERED; ret = MF_RECOVERED;
else else
pr_info("Memory failure: %#lx: Failed to invalidate\n", pr_info("%#lx: Failed to invalidate\n", pfn);
pfn);
} }
return ret; return ret;
@ -864,7 +864,7 @@ static bool has_extra_refcount(struct page_state *ps, struct page *p,
count -= 1; count -= 1;
if (count > 0) { if (count > 0) {
pr_err("Memory failure: %#lx: %s still referenced by %d users\n", pr_err("%#lx: %s still referenced by %d users\n",
page_to_pfn(p), action_page_types[ps->type], count); page_to_pfn(p), action_page_types[ps->type], count);
return true; return true;
} }
@ -888,7 +888,7 @@ static int me_kernel(struct page_state *ps, struct page *p)
*/ */
static int me_unknown(struct page_state *ps, struct page *p) static int me_unknown(struct page_state *ps, struct page *p)
{ {
pr_err("Memory failure: %#lx: Unknown page state\n", page_to_pfn(p)); pr_err("%#lx: Unknown page state\n", page_to_pfn(p));
unlock_page(p); unlock_page(p);
return MF_FAILED; return MF_FAILED;
} }
@ -1173,7 +1173,7 @@ static void action_result(unsigned long pfn, enum mf_action_page_type type,
trace_memory_failure_event(pfn, type, result); trace_memory_failure_event(pfn, type, result);
num_poisoned_pages_inc(); num_poisoned_pages_inc();
pr_err("Memory failure: %#lx: recovery action for %s: %s\n", pr_err("%#lx: recovery action for %s: %s\n",
pfn, action_page_types[type], action_name[result]); pfn, action_page_types[type], action_name[result]);
} }
@ -1248,8 +1248,7 @@ static int __get_hwpoison_page(struct page *page, unsigned long flags)
if (head == compound_head(page)) if (head == compound_head(page))
return 1; return 1;
pr_info("Memory failure: %#lx cannot catch tail\n", pr_info("%#lx cannot catch tail\n", page_to_pfn(page));
page_to_pfn(page));
put_page(head); put_page(head);
} }
@ -1312,7 +1311,7 @@ static int get_any_page(struct page *p, unsigned long flags)
} }
out: out:
if (ret == -EIO) if (ret == -EIO)
pr_err("Memory failure: %#lx: unhandlable page.\n", page_to_pfn(p)); pr_err("%#lx: unhandlable page.\n", page_to_pfn(p));
return ret; return ret;
} }
@ -1411,13 +1410,12 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
return true; return true;
if (PageKsm(p)) { if (PageKsm(p)) {
pr_err("Memory failure: %#lx: can't handle KSM pages.\n", pfn); pr_err("%#lx: can't handle KSM pages.\n", pfn);
return false; return false;
} }
if (PageSwapCache(p)) { if (PageSwapCache(p)) {
pr_err("Memory failure: %#lx: keeping poisoned page in swap cache\n", pr_err("%#lx: keeping poisoned page in swap cache\n", pfn);
pfn);
ttu |= TTU_IGNORE_HWPOISON; ttu |= TTU_IGNORE_HWPOISON;
} }
@ -1435,7 +1433,7 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
} else { } else {
kill = 0; kill = 0;
ttu |= TTU_IGNORE_HWPOISON; ttu |= TTU_IGNORE_HWPOISON;
pr_info("Memory failure: %#lx: corrupted page was clean: dropped without side effects\n", pr_info("%#lx: corrupted page was clean: dropped without side effects\n",
pfn); pfn);
} }
} }
@ -1464,14 +1462,14 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
try_to_unmap(folio, ttu|TTU_RMAP_LOCKED); try_to_unmap(folio, ttu|TTU_RMAP_LOCKED);
i_mmap_unlock_write(mapping); i_mmap_unlock_write(mapping);
} else } else
pr_info("Memory failure: %#lx: could not lock mapping for mapped huge page\n", pfn); pr_info("%#lx: could not lock mapping for mapped huge page\n", pfn);
} else { } else {
try_to_unmap(folio, ttu); try_to_unmap(folio, ttu);
} }
unmap_success = !page_mapped(hpage); unmap_success = !page_mapped(hpage);
if (!unmap_success) if (!unmap_success)
pr_err("Memory failure: %#lx: failed to unmap page (mapcount=%d)\n", pr_err("%#lx: failed to unmap page (mapcount=%d)\n",
pfn, page_mapcount(hpage)); pfn, page_mapcount(hpage));
/* /*
@ -1732,7 +1730,7 @@ static int try_memory_failure_hugetlb(unsigned long pfn, int flags, int *hugetlb
*hugetlb = 0; *hugetlb = 0;
return 0; return 0;
} else if (res == -EHWPOISON) { } else if (res == -EHWPOISON) {
pr_err("Memory failure: %#lx: already hardware poisoned\n", pfn); pr_err("%#lx: already hardware poisoned\n", pfn);
if (flags & MF_ACTION_REQUIRED) { if (flags & MF_ACTION_REQUIRED) {
head = compound_head(p); head = compound_head(p);
res = kill_accessing_process(current, page_to_pfn(head), flags); res = kill_accessing_process(current, page_to_pfn(head), flags);
@ -1901,8 +1899,7 @@ int memory_failure(unsigned long pfn, int flags)
goto unlock_mutex; goto unlock_mutex;
} }
} }
pr_err("Memory failure: %#lx: memory outside kernel control\n", pr_err("%#lx: memory outside kernel control\n", pfn);
pfn);
res = -ENXIO; res = -ENXIO;
goto unlock_mutex; goto unlock_mutex;
} }
@ -1913,8 +1910,7 @@ int memory_failure(unsigned long pfn, int flags)
goto unlock_mutex; goto unlock_mutex;
if (TestSetPageHWPoison(p)) { if (TestSetPageHWPoison(p)) {
pr_err("Memory failure: %#lx: already hardware poisoned\n", pr_err("%#lx: already hardware poisoned\n", pfn);
pfn);
res = -EHWPOISON; res = -EHWPOISON;
if (flags & MF_ACTION_REQUIRED) if (flags & MF_ACTION_REQUIRED)
res = kill_accessing_process(current, pfn, flags); res = kill_accessing_process(current, pfn, flags);
@ -2130,7 +2126,7 @@ void memory_failure_queue(unsigned long pfn, int flags)
if (kfifo_put(&mf_cpu->fifo, entry)) if (kfifo_put(&mf_cpu->fifo, entry))
schedule_work_on(smp_processor_id(), &mf_cpu->work); schedule_work_on(smp_processor_id(), &mf_cpu->work);
else else
pr_err("Memory failure: buffer overflow when queuing memory failure at %#lx\n", pr_err("buffer overflow when queuing memory failure at %#lx\n",
pfn); pfn);
spin_unlock_irqrestore(&mf_cpu->lock, proc_flags); spin_unlock_irqrestore(&mf_cpu->lock, proc_flags);
put_cpu_var(memory_failure_cpu); put_cpu_var(memory_failure_cpu);
@ -2187,6 +2183,8 @@ static int __init memory_failure_init(void)
} }
core_initcall(memory_failure_init); core_initcall(memory_failure_init);
#undef pr_fmt
#define pr_fmt(fmt) "" fmt
#define unpoison_pr_info(fmt, pfn, rs) \ #define unpoison_pr_info(fmt, pfn, rs) \
({ \ ({ \
if (__ratelimit(rs)) \ if (__ratelimit(rs)) \