Re: [PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-16 Thread Tobin C. Harding
On Tue, May 15, 2018 at 08:29:47AM -0700, Randy Dunlap wrote: > On 05/14/2018 09:38 PM, Tobin C. Harding wrote: > > > Documentation/admin-guide/kernel-parameters.txt | 8 > > lib/vsprintf.c | 18 ++ > > 2 files changed, 26 insertions(+)

Re: [PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-16 Thread Tobin C. Harding
On Tue, May 15, 2018 at 08:29:47AM -0700, Randy Dunlap wrote: > On 05/14/2018 09:38 PM, Tobin C. Harding wrote: > > > Documentation/admin-guide/kernel-parameters.txt | 8 > > lib/vsprintf.c | 18 ++ > > 2 files changed, 26 insertions(+)

Re: [PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-15 Thread Randy Dunlap
On 05/14/2018 09:38 PM, Tobin C. Harding wrote: > Documentation/admin-guide/kernel-parameters.txt | 8 > lib/vsprintf.c | 18 ++ > 2 files changed, 26 insertions(+) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt >

Re: [PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-15 Thread Randy Dunlap
On 05/14/2018 09:38 PM, Tobin C. Harding wrote: > Documentation/admin-guide/kernel-parameters.txt | 8 > lib/vsprintf.c | 18 ++ > 2 files changed, 26 insertions(+) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt >

Re: [PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-15 Thread Steven Rostedt
Anna-Maria, Can you test this patch on that kernel you were having issues with (the one triggering the RCU stalls, and not having entropy to show the pointers of the timer events). And report back what you find. Thanks! -- Steve On Tue, 15 May 2018 14:38:35 +1000 "Tobin C. Harding"

Re: [PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-15 Thread Steven Rostedt
Anna-Maria, Can you test this patch on that kernel you were having issues with (the one triggering the RCU stalls, and not having entropy to show the pointers of the timer events). And report back what you find. Thanks! -- Steve On Tue, 15 May 2018 14:38:35 +1000 "Tobin C. Harding" wrote:

[PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-14 Thread Tobin C. Harding
Currently printing [hashed] pointers requires enough entropy to be available. Early in the boot sequence this may not be the case resulting in a dummy string '(ptrval)' being printed. This makes debugging the early boot sequence difficult. We can relax the requirement to use

[PATCH] vsprintf: Add command line option debug_boot_weak_hash

2018-05-14 Thread Tobin C. Harding
Currently printing [hashed] pointers requires enough entropy to be available. Early in the boot sequence this may not be the case resulting in a dummy string '(ptrval)' being printed. This makes debugging the early boot sequence difficult. We can relax the requirement to use