Re: Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-20 Thread Masami Hiramatsu
(2014/04/18 12:09), Masami Hiramatsu wrote: > (2014/04/17 22:43), Vivek Goyal wrote: >> On Thu, Apr 17, 2014 at 10:59:14AM +0900, Masami Hiramatsu wrote: >> >> [..] > @@ -112,9 +113,14 @@ void panic(const char *fmt, ...) > /* >* If we have crashed and we have a crash kernel

Re: Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-20 Thread Masami Hiramatsu
(2014/04/18 12:09), Masami Hiramatsu wrote: (2014/04/17 22:43), Vivek Goyal wrote: On Thu, Apr 17, 2014 at 10:59:14AM +0900, Masami Hiramatsu wrote: [..] @@ -112,9 +113,14 @@ void panic(const char *fmt, ...) /* * If we have crashed and we have a crash kernel loaded let it handle *

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-17 Thread Masami Hiramatsu
(2014/04/17 22:43), Vivek Goyal wrote: > On Thu, Apr 17, 2014 at 10:59:14AM +0900, Masami Hiramatsu wrote: > > [..] @@ -112,9 +113,14 @@ void panic(const char *fmt, ...) /* * If we have crashed and we have a crash kernel loaded let it handle * everything else.

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-17 Thread Vivek Goyal
On Thu, Apr 17, 2014 at 10:59:14AM +0900, Masami Hiramatsu wrote: [..] > >> @@ -112,9 +113,14 @@ void panic(const char *fmt, ...) > >>/* > >> * If we have crashed and we have a crash kernel loaded let it handle > >> * everything else. > >> - * Do we want to call this before we try

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-17 Thread Vivek Goyal
On Thu, Apr 17, 2014 at 10:59:14AM +0900, Masami Hiramatsu wrote: [..] @@ -112,9 +113,14 @@ void panic(const char *fmt, ...) /* * If we have crashed and we have a crash kernel loaded let it handle * everything else. - * Do we want to call this before we try to display a

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-17 Thread Masami Hiramatsu
(2014/04/17 22:43), Vivek Goyal wrote: On Thu, Apr 17, 2014 at 10:59:14AM +0900, Masami Hiramatsu wrote: [..] @@ -112,9 +113,14 @@ void panic(const char *fmt, ...) /* * If we have crashed and we have a crash kernel loaded let it handle * everything else. - * Do we want to

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-16 Thread Masami Hiramatsu
Thank you for review! (2014/04/16 22:48), Vivek Goyal wrote: > On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: >> Add a "late_kdump" option to run kdump after running panic >> notifiers and dump kmsg. This can help rare situations which >> kdump drops in failure because of

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-16 Thread Vivek Goyal
On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: > Add a "late_kdump" option to run kdump after running panic > notifiers and dump kmsg. This can help rare situations which > kdump drops in failure because of unstable crashed kernel > or hardware failure (memory corruption on

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-16 Thread Vivek Goyal
On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable crashed kernel or hardware failure (memory corruption on critical

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-16 Thread Masami Hiramatsu
Thank you for review! (2014/04/16 22:48), Vivek Goyal wrote: On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable

Re: Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-15 Thread Masami Hiramatsu
(2014/04/16 11:33), Vivek Goyal wrote: > On Wed, Apr 16, 2014 at 10:28:39AM +0900, Masami Hiramatsu wrote: >> (2014/04/15 23:08), Vivek Goyal wrote: >>> On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: >>> >>> [..] > Masami, > > So what's the alternative to kdump which

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-15 Thread Vivek Goyal
On Wed, Apr 16, 2014 at 10:28:39AM +0900, Masami Hiramatsu wrote: > (2014/04/15 23:08), Vivek Goyal wrote: > > On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: > > > > [..] > >>> Masami, > >>> > >>> So what's the alternative to kdump which is more reliable? IOW, what > >>> action

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-15 Thread Masami Hiramatsu
(2014/04/15 23:08), Vivek Goyal wrote: > On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: > > [..] >>> Masami, >>> >>> So what's the alternative to kdump which is more reliable? IOW, what >>> action you are planning to take through kmsg_dump() or through >>> panic_notifiers? >>>

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-15 Thread Vivek Goyal
On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: [..] > > Masami, > > > > So what's the alternative to kdump which is more reliable? IOW, what > > action you are planning to take through kmsg_dump() or through > > panic_notifiers? > > > > I have seen that many a times

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-15 Thread Vivek Goyal
On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: [..] Masami, So what's the alternative to kdump which is more reliable? IOW, what action you are planning to take through kmsg_dump() or through panic_notifiers? I have seen that many a times developers have tried

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-15 Thread Masami Hiramatsu
(2014/04/15 23:08), Vivek Goyal wrote: On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: [..] Masami, So what's the alternative to kdump which is more reliable? IOW, what action you are planning to take through kmsg_dump() or through panic_notifiers? I have seen that

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-15 Thread Vivek Goyal
On Wed, Apr 16, 2014 at 10:28:39AM +0900, Masami Hiramatsu wrote: (2014/04/15 23:08), Vivek Goyal wrote: On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: [..] Masami, So what's the alternative to kdump which is more reliable? IOW, what action you are planning to

Re: Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-15 Thread Masami Hiramatsu
(2014/04/16 11:33), Vivek Goyal wrote: On Wed, Apr 16, 2014 at 10:28:39AM +0900, Masami Hiramatsu wrote: (2014/04/15 23:08), Vivek Goyal wrote: On Tue, Apr 15, 2014 at 10:37:40AM +0900, Masami Hiramatsu wrote: [..] Masami, So what's the alternative to kdump which is more reliable? IOW,

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-14 Thread Masami Hiramatsu
Hi Vivek, (2014/04/15 4:31), Vivek Goyal wrote: > On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: >> Add a "late_kdump" option to run kdump after running panic >> notifiers and dump kmsg. This can help rare situations which >> kdump drops in failure because of unstable crashed

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-14 Thread Vivek Goyal
On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: > Add a "late_kdump" option to run kdump after running panic > notifiers and dump kmsg. This can help rare situations which > kdump drops in failure because of unstable crashed kernel > or hardware failure (memory corruption on

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-14 Thread Vivek Goyal
On Sun, Apr 13, 2014 at 10:14:18PM -0700, Eric W. Biederman wrote: > Masami Hiramatsu writes: > > > Add a "late_kdump" option to run kdump after running panic > > notifiers and dump kmsg. This can help rare situations which > > kdump drops in failure because of unstable crashed kernel > > or

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-14 Thread Masami Hiramatsu
(2014/04/14 14:14), Eric W. Biederman wrote: > Masami Hiramatsu writes: > >> Add a "late_kdump" option to run kdump after running panic >> notifiers and dump kmsg. This can help rare situations which >> kdump drops in failure because of unstable crashed kernel >> or hardware failure (memory

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-14 Thread Masami Hiramatsu
Hi Vivek, (2014/04/15 4:31), Vivek Goyal wrote: On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable crashed kernel or

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-14 Thread Masami Hiramatsu
(2014/04/14 14:14), Eric W. Biederman wrote: Masami Hiramatsu masami.hiramatsu...@hitachi.com writes: Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable crashed kernel or hardware

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-14 Thread Vivek Goyal
On Sun, Apr 13, 2014 at 10:14:18PM -0700, Eric W. Biederman wrote: Masami Hiramatsu masami.hiramatsu...@hitachi.com writes: Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-14 Thread Vivek Goyal
On Mon, Apr 14, 2014 at 01:51:58PM +0900, Masami Hiramatsu wrote: Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable crashed kernel or hardware failure (memory corruption on critical

Re: [PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-13 Thread Eric W. Biederman
Masami Hiramatsu writes: > Add a "late_kdump" option to run kdump after running panic > notifiers and dump kmsg. This can help rare situations which > kdump drops in failure because of unstable crashed kernel > or hardware failure (memory corruption on critical data/code), > or the 2nd kernel is

[PATCH] kernel/panic: Add "late_kdump" option for kdump in unstable condition

2014-04-13 Thread Masami Hiramatsu
Add a "late_kdump" option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable crashed kernel or hardware failure (memory corruption on critical data/code), or the 2nd kernel is broken by the 1st kernel (it's a

[PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-13 Thread Masami Hiramatsu
Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable crashed kernel or hardware failure (memory corruption on critical data/code), or the 2nd kernel is broken by the 1st kernel (it's a

Re: [PATCH] kernel/panic: Add late_kdump option for kdump in unstable condition

2014-04-13 Thread Eric W. Biederman
Masami Hiramatsu masami.hiramatsu...@hitachi.com writes: Add a late_kdump option to run kdump after running panic notifiers and dump kmsg. This can help rare situations which kdump drops in failure because of unstable crashed kernel or hardware failure (memory corruption on critical