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SubjectRe: [PATCH v3 1/2] config: Adding the new config parameter CONFIG_PROVE_LOCKING_SMALL for sparc
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On 9/28/2016 3:39 AM, Peter Zijlstra wrote:
> On Tue, Sep 27, 2016 at 12:33:27PM -0700, Babu Moger wrote:
>> This new config parameter limits the space used for "Lock debugging:
>> prove locking correctness" by about 4MB. The current sparc systems have
>> the limitation of 32MB size for kernel size including .text, .data and
>> .bss sections. With PROVE_LOCKING feature, the kernel size could grow
>> beyond this limit and causing system boot-up issues. With this option,
>> kernel limits the size of the entries of lock_chains, stack_trace etc.,
>> so that kernel fits in required size limit. This is not visible to user
>> and only used for sparc.
>>
>> Signed-off-by: Babu Moger <babu.moger@oracle.com>
> You forgot to Cc Dave, and since you're touching sparc I need an Ack
> from him before I can queue this.
Dave, Can you please take a look at the patch. Please ack it if it looks
good.
Thanks
>
> Dave?
>
>> ---
>> arch/sparc/Kconfig | 1 +
>> lib/Kconfig.debug | 3 +++
>> 2 files changed, 4 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
>> index 59b0960..8da321c 100644
>> --- a/arch/sparc/Kconfig
>> +++ b/arch/sparc/Kconfig
>> @@ -44,6 +44,7 @@ config SPARC
>> select ARCH_HAS_SG_CHAIN
>> select CPU_NO_EFFICIENT_FFS
>> select HAVE_ARCH_HARDENED_USERCOPY
>> + select PROVE_LOCKING_SMALL if PROVE_LOCKING
>>
>> config SPARC32
>> def_bool !64BIT
>> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
>> index cab7405..597e589 100644
>> --- a/lib/Kconfig.debug
>> +++ b/lib/Kconfig.debug
>> @@ -1084,6 +1084,9 @@ config PROVE_LOCKING
>>
>> For more details, see Documentation/locking/lockdep-design.txt.
>>
>> +config PROVE_LOCKING_SMALL
>> + bool
>> +
>> config LOCKDEP
>> bool
>> depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
>> --
>> 1.7.1
>>

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