The patch titled
Subject: mm, memory_failure: only send BUS_MCEERR_AO to early-kill process
has been added to the -mm tree. Its filename is
mm-memory_failure-only-send-bus_mceerr_ao-to-early-kill-process.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memory_failure-only-send-bus_mceerr_ao-to-early-kill-process.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memory_failure-only-send-bus_mceerr_ao-to-early-kill-process.patch
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------------------------------------------------------
From: Zhang Yi <wetpzy@xxxxxxxxx>
Subject: mm, memory_failure: only send BUS_MCEERR_AO to early-kill process
If a process don't need early-kill, it may not care the BUS_MCEERR_AO.
Let the process to be killed when it really access the corrupted memory.
Link: http://lkml.kernel.org/r/1590476801-19882-1-git-send-email-wetp.zy@xxxxxxxxxxxxxxxxx
Signed-off-by: Zhang Yi <wetpzy@xxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Naoya Horiguchi <nao.horiguchi@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/mm/memory-failure.c~mm-memory_failure-only-send-bus_mceerr_ao-to-early-kill-process
+++ a/mm/memory-failure.c
@@ -210,7 +210,7 @@ static int kill_proc(struct to_kill *tk,
{
struct task_struct *t = tk->tsk;
short addr_lsb = tk->size_shift;
- int ret;
+ int ret = 0;
pr_err("Memory failure: %#lx: Sending SIGBUS to %s:%d due to hardware memory corruption\n",
pfn, t->comm, t->pid);
@@ -225,8 +225,9 @@ static int kill_proc(struct to_kill *tk,
* This could cause a loop when the user sets SIGBUS
* to SIG_IGN, but hopefully no one will do that?
*/
- ret = send_sig_mceerr(BUS_MCEERR_AO, (void __user *)tk->addr,
- addr_lsb, t); /* synchronous? */
+ if ((t->flags & PF_MCE_PROCESS) && (t->flags & PF_MCE_EARLY))
+ ret = send_sig_mceerr(BUS_MCEERR_AO,
+ (void __user *)tk->addr, addr_lsb, t);
}
if (ret < 0)
pr_info("Memory failure: Error sending signal to %s:%d: %d\n",
_
Patches currently in -mm which might be from wetpzy@xxxxxxxxx are
mm-memory_failure-only-send-bus_mceerr_ao-to-early-kill-process.patch
