The patch titled
Subject: mm, memory_failure: don't send BUS_MCEERR_AO for action required error
has been added to the -mm tree. Its filename is
mm-memory_failure-dont-send-bus_mceerr_ao-for-action-required-error.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memory_failure-dont-send-bus_mceerr_ao-for-action-required-error.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memory_failure-dont-send-bus_mceerr_ao-for-action-required-error.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** 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: Wetp Zhang <wetp.zy@xxxxxxxxxxxxxxxxx>
Subject: mm, memory_failure: don't send BUS_MCEERR_AO for action required error
Some processes dont't want to be killed early, but in "Action Required"
case, those also may be killed by BUS_MCEERR_AO when sharing memory with
other which is accessing the fail memory. And sending SIGBUS with
BUS_MCEERR_AO for action required error is strange, so ignore the
non-current processes here.
Link: http://lkml.kernel.org/r/1590817116-21281-1-git-send-email-wetp.zy@xxxxxxxxxxxxxxxxx
Signed-off-by: Wetp Zhang <wetp.zy@xxxxxxxxxxxxxxxxx>
Suggested-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Acked-by: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
--- a/mm/memory-failure.c~mm-memory_failure-dont-send-bus_mceerr_ao-for-action-required-error
+++ a/mm/memory-failure.c
@@ -210,14 +210,17 @@ 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);
+ if ((t->mm == current->mm) || !(flags & MF_ACTION_REQUIRED))
+ pr_err("Memory failure: %#lx: Sending SIGBUS to %s:%d due to hardware memory corruption\n",
+ pfn, t->comm, t->pid);
- if ((flags & MF_ACTION_REQUIRED) && t->mm == current->mm) {
- ret = force_sig_mceerr(BUS_MCEERR_AR, (void __user *)tk->addr,
- addr_lsb);
+ if (flags & MF_ACTION_REQUIRED) {
+ if (t->mm == current->mm)
+ ret = force_sig_mceerr(BUS_MCEERR_AR,
+ (void __user *)tk->addr, addr_lsb);
+ /* send no signal to non-current processes */
} else {
/*
* Don't use force here, it's convenient if the signal
_
Patches currently in -mm which might be from wetp.zy@xxxxxxxxxxxxxxxxx are
mm-memory_failure-dont-send-bus_mceerr_ao-for-action-required-error.patch
