(2013/04/11 22:00), Ric Mason wrote:
> Hi Mitsuhiro,
> On 04/11/2013 08:51 PM, Mitsuhiro Tanino wrote:
>> (2013/04/11 12:53), Simon Jeons wrote:
>>> One question against mce instead of the patchset. ;-)
>>>
>>> When check memory is bad? Before memory access?
to hook into.
Yes. I think both short term solution and long term solution is necessary
in order to enable hwpoison feature for Linux as KVM hypervisor.
So my proposal is as follows,
For short term solution to care both memory error and I/O error:
- I will resend a panic knob to handle data lost r
ages related to a corrupted file
and the other is for adding a panic knob to handle data lost of dirty cache
which is caused by both memory error and I/O error.
Regards,
Mitsuhiro Tanino
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(2013/04/11 16:11), Naoya Horiguchi wrote:
> Hi Tanino-san,
>
> On Thu, Apr 11, 2013 at 12:26:19PM +0900, Mitsuhiro Tanino wrote:
> ...
>> Solution
>> -
>> The patch proposes a new sysctl interface, vm.memory_failure_dirty_panic,
>> in order to prevent
(2013/04/11 16:11), Naoya Horiguchi wrote:
Hi Tanino-san,
On Thu, Apr 11, 2013 at 12:26:19PM +0900, Mitsuhiro Tanino wrote:
...
Solution
-
The patch proposes a new sysctl interface, vm.memory_failure_dirty_panic,
in order to prevent data corruption comes from data lost problem
,
Mitsuhiro Tanino
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Please read the FAQ at http://www.tux.org/lkml/
and I/O error.
For long term solution:
- Andi's proposal or Horiguchi-san's new pagecache tag based mechanism
Regards,
Mitsuhiro Tanino
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(2013/04/11 22:00), Ric Mason wrote:
Hi Mitsuhiro,
On 04/11/2013 08:51 PM, Mitsuhiro Tanino wrote:
(2013/04/11 12:53), Simon Jeons wrote:
One question against mce instead of the patchset. ;-)
When check memory is bad? Before memory access? Is there a process scan it
period?
Hi Simon-san
on a memory before
OS accesses the memory bit, MCA recovery notifies SRAO error into OS
and OS handles the SRAO error using hwpoison function.
Regards,
Mitsuhiro Tanino
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before
OS accesses the memory bit, MCA recovery notifies SRAO error into OS
and OS handles the SRAO error using hwpoison function.
Regards,
Mitsuhiro Tanino
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the number of messages we can send before rate limiting.
Signed-off-by: Mitsuhiro Tanino
---
diff --git a/a/Documentation/sysctl/vm.txt b/b/Documentation/sysctl/vm.txt
index 7dad994..eea6f4d 100644
--- a/a/Documentation/sysctl/vm.txt
+++ b/b/Documentation/sysctl/vm.txt
@@ -36,6 +36,8 @@ Currently
This patch introduces a sysctl interface,
vm.memory_failure_dirty_panic, to provide selectable actions
when a memory error is detected on dirty page cache.
Signed-off-by: Mitsuhiro Tanino
---
diff --git a/a/Documentation/sysctl/vm.txt b/b/Documentation/sysctl/vm.txt
index 078701f..7dad994
Hi All,
Please find a patch set that introduces these new sysctl interfaces,
to handle a case when an memory error is detected on dirty page cache.
- vm.memory_failure_dirty_panic
- vm.memory_failure_print_ratelimit
- vm.memory_failure_print_ratelimit_burst
Problem
-
Recently, it is
Hi All,
Please find a patch set that introduces these new sysctl interfaces,
to handle a case when an memory error is detected on dirty page cache.
- vm.memory_failure_dirty_panic
- vm.memory_failure_print_ratelimit
- vm.memory_failure_print_ratelimit_burst
Problem
-
Recently, it is
This patch introduces a sysctl interface,
vm.memory_failure_dirty_panic, to provide selectable actions
when a memory error is detected on dirty page cache.
Signed-off-by: Mitsuhiro Tanino mitsuhiro.tanino...@hitachi.com
---
diff --git a/a/Documentation/sysctl/vm.txt b/b/Documentation/sysctl
the number of messages we can send before rate limiting.
Signed-off-by: Mitsuhiro Tanino mitsuhiro.tanino...@hitachi.com
---
diff --git a/a/Documentation/sysctl/vm.txt b/b/Documentation/sysctl/vm.txt
index 7dad994..eea6f4d 100644
--- a/a/Documentation/sysctl/vm.txt
+++ b/b/Documentation/sysctl
patch into makedumpfile-1.5.2.
Regards,
Mitsuhiro Tanino
> TO: mm-comm...@vger.kernel.org;
> CC: mitsuhiro.tanino...@hitachi.com; ebied...@xmission.com;
> vgo...@redhat.com;
> Sender: a...@linux-foundation.org
> Sugject: + kexec-export-pg_hwpoison-flag-into-vmcoreinfo.patch added
into makedumpfile-1.5.2.
Regards,
Mitsuhiro Tanino
TO: mm-comm...@vger.kernel.org;
CC: mitsuhiro.tanino...@hitachi.com; ebied...@xmission.com;
vgo...@redhat.com;
Sender: a...@linux-foundation.org
Sugject: + kexec-export-pg_hwpoison-flag-into-vmcoreinfo.patch added to -mm
tree
Date: 2013/02/13
introduce a function into "makedumpfile" to exclude
hwpoison page from vmcore dump.
In order to introduce this function, PG_hwpoison flag have
to export into vmcoreinfo.
Acked-by: "Eric W. Biederman"
Signed-off-by: Mitsuhiro Tanino
---
kernel/kexec.c |3 +++
1 file change
a function into makedumpfile to exclude
hwpoison page from vmcore dump.
In order to introduce this function, PG_hwpoison flag have
to export into vmcoreinfo.
Acked-by: Eric W. Biederman ebied...@xmission.com
Signed-off-by: Mitsuhiro Tanino mitsuhiro.tanino...@hitachi.com
---
kernel/kexec.c |3
Re: [Patch 0/2] Exclude hwpoison page from vmcore dump
(2012/11/01 19:40), Eric W. Biederman wrote:
> Mitsuhiro Tanino writes:
> I agree. If we are performing filtering filtering out of poisoned pages
> seems very reasonable. So ack on the basic concept.
>
> Eric
Hello, E
Re: [Patch 0/2] Exclude hwpoison page from vmcore dump
(2012/11/01 19:40), Eric W. Biederman wrote:
Mitsuhiro Tanino mitsuhiro.tanino...@hitachi.com writes:
I agree. If we are performing filtering filtering out of poisoned pages
seems very reasonable. So ack on the basic concept.
Eric
Hi Vivek,
(2012/10/31 23:14), Vivek Goyal wrote:
> If hwpoision functionality is not available in hardware, then respective
> bit will not be even set in struct page and it will be saved by default.
> So it should not matter whether hardware has hwpoision functionality
> or not.
Thanks, I
Hi Vivek,
(2012/10/31 23:14), Vivek Goyal wrote:
If hwpoision functionality is not available in hardware, then respective
bit will not be even set in struct page and it will be saved by default.
So it should not matter whether hardware has hwpoision functionality
or not.
Thanks, I
mcore dump.
In order to introduce this function, PG_hwpoison flag have
to export into vmcoreinfo.
Signed-off-by: Mitsuhiro Tanino
---
kernel/kexec.c |3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 0668d58..0d5d6bc 100644
--- a/kernel/kexec.c
+++ b/kerne
This patch introduces a function which excludes hwpoison pages
from vmcore as a default action for makedumpfile.
Signed-off-by: Mitsuhiro Tanino
diff -uprN a/makedumpfile.c b/makedumpfile.c
--- a/makedumpfile.c2012-10-01 15:26:54.510354074 +0900
+++ b/makedumpfile.c2012-10-29 22:32
Hi All,
Please find a set of patches that introduce a function into
"makedumpfile" to exclude hwpoison page from vmcore dump.
Changes from v1 to v2:
Patch1: Remove "-p" option.
Details as described below.
Problem
---
Recently, according to increase large memory systems, possibility of
Hi Vivek,
(2012/10/30 23:37), Vivek Goyal wrote:
> Why to introduce this option "-p"? Until and unless there are serious
> side effects, this should be default functionality. Isn't it? Who would
> like to touch/save poisoned pages and run into MCE?
Thank you for your review of my patch.
In my
Hi Vivek,
(2012/10/30 23:37), Vivek Goyal wrote:
Why to introduce this option -p? Until and unless there are serious
side effects, this should be default functionality. Isn't it? Who would
like to touch/save poisoned pages and run into MCE?
Thank you for your review of my patch.
In my
Hi All,
Please find a set of patches that introduce a function into
makedumpfile to exclude hwpoison page from vmcore dump.
Changes from v1 to v2:
Patch1: Remove -p option.
Details as described below.
Problem
---
Recently, according to increase large memory systems, possibility of
This patch introduces a function which excludes hwpoison pages
from vmcore as a default action for makedumpfile.
Signed-off-by: Mitsuhiro Tanino mitsuhiro.tanino...@hitachi.com
diff -uprN a/makedumpfile.c b/makedumpfile.c
--- a/makedumpfile.c2012-10-01 15:26:54.510354074 +0900
+++ b
to introduce this function, PG_hwpoison flag have
to export into vmcoreinfo.
Signed-off-by: Mitsuhiro Tanino mitsuhiro.tanino...@hitachi.com
---
kernel/kexec.c |3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 0668d58..0d5d6bc 100644
--- a/kernel/kexec.c
+++ b
hwpoison page from vmcore dump.
In order to introduce this feature, PG_hwpoison flag have
to export into vmcoreinfo.
Signed-off-by: Mitsuhiro Tanino
---
kernel/kexec.c |3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 0668d58..0d5d6bc 100644
--- a/kerne
"makedumpfile" has filtering function to exclude some types of pages,
like zero page, free page, user data, etc, without saving the whole dump.
This patch introduce a new "-p" option into "makedumpfile" to
exclude hwpoison page while copying vmcore to dumpfile.
S
Hi All,
Please find a set of patches that introduce a new "-p" option into
"makedumpfile" to exclude hwpoison page from vmcore dump.
Details as described below.
Problem
---
Recently, according to increase large memory systems, possibility of
failures which come from memory crash are also
Hi All,
Please find a set of patches that introduce a new -p option into
makedumpfile to exclude hwpoison page from vmcore dump.
Details as described below.
Problem
---
Recently, according to increase large memory systems, possibility of
failures which come from memory crash are also
makedumpfile has filtering function to exclude some types of pages,
like zero page, free page, user data, etc, without saving the whole dump.
This patch introduce a new -p option into makedumpfile to
exclude hwpoison page while copying vmcore to dumpfile.
Signed-off-by: Mitsuhiro Tanino
to introduce this feature, PG_hwpoison flag have
to export into vmcoreinfo.
Signed-off-by: Mitsuhiro Tanino mitsuhiro.tanino...@hitachi.com
---
kernel/kexec.c |3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 0668d58..0d5d6bc 100644
--- a/kernel/kexec.c
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