linux-kernel - Re: [PATCH] merge_config.sh: Use the first file as the initial config

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Date:	Thu, 02 Feb 2012 12:37:12 -0800
From:	Darren Hart <dvhart@...ux.intel.com>
To:	John Stultz <john.stultz@...aro.org>
CC:	Josh Boyer <jwboyer@...hat.com>, Michal Marek <mmarek@...e.cz>,
	kernel-team@...oraproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] merge_config.sh: Use the first file as the initial config



On 02/02/2012 12:14 PM, John Stultz wrote:
> On Wed, 2012-02-01 at 12:01 -0500, Josh Boyer wrote:
>> Take the first config fragment and use it verbatim as the initial config set.
>> This avoids running the verification loop for the first file, as nothing has
>> actually been merged at this point.  This significantly increases performance
>> for large config fragments.
>>
>> Signed-off-by: Josh Boyer <jwboyer@...hat.com>
>> ---
>>
>> When experimenting with merge_config.sh on the Fedora config fragments, this
>> cut the execution time of a single invocation with all the config fragments
>> in half (from 28 seconds to 13 seconds).
> 
> Adding Darren to the CC.
> 
> Nice! Looks ok to me.
> 
> Acked-by: John Stultz <john.stultz@...aro.org>

Thanks Josh,

Acked-by: Darren Hart <dvhart@...ux.intel.com>

> 
>>  scripts/kconfig/merge_config.sh |    6 +++++-
>>  1 files changed, 5 insertions(+), 1 deletions(-)
>>
>> diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh
>> index ceadf0e..23d738a 100644
>> --- a/scripts/kconfig/merge_config.sh
>> +++ b/scripts/kconfig/merge_config.sh
>> @@ -58,12 +58,16 @@ while true; do
>>  	esac
>>  done
>>
>> -
>> +INITFILE=$1
>> +shift;
>>
>>  MERGE_LIST=$*
>>  SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
>>  TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
>>
>> +echo "Using $INITFILE as base"
>> +cat $INITFILE > $TMP_FILE
>> +
>>  # Merge files, printing warnings on overrided values
>>  for MERGE_FILE in $MERGE_LIST ; do
>>  	echo "Merging $MERGE_FILE"
> 
> 

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel
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