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From: "Huang\, Ying" <ying.huang@linux.intel.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>,
	"Huang, Ying" <ying.huang@intel.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Borislav Petkov <bp@suse.de>,
	"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] GHES: Fix cached error-status
Date: Mon, 26 Oct 2015 11:20:35 +0800	[thread overview]
Message-ID: <87611uz56k.fsf@yhuang-dev.intel.com> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F32B5DE60@ORSMSX114.amr.corp.intel.com> (Tony Luck's message of "Sat, 24 Oct 2015 07:05:15 +0800")

Hi, Tony,

"Luck, Tony" <tony.luck@intel.com> writes:
>> ping?
>
> I'm not actually sure that the code is wrong.  As you say it is a pretty strange loop.
>
> We seem to want to look at a bunch of conditions, and use "continue" to ignore
> bits until we find one that we like the look of.  Perhaps as soon as we do, we want
> to believe it to get our return value? Perhaps the code knows that we won't find
> another section that matches all the tests, so it isn't worth going around the loop
> again.
>
> Ying: You wrote this code 4 years ago. Any recollections of why it looks like it does?

Sorry for late.  I read the code again, and found the although the
original code is a little tricky, it actually works.

In ghes_estatus_caches[], for caches with same contents, the cache with
biggest (newest) cache->time_in should be the first.  So if we found one
cache with too small (old) cache->time_in, we can say there are no cache
with same contents and bigger (newer) cache->time_in, so that we can
make decision (break) earlier.

Best Regards,
Huang, Ying

WARNING: multiple messages have this Message-ID (diff)
From: "Huang\, Ying" <ying.huang@linux.intel.com>
To: "Luck\, Tony" <tony.luck@intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>, "Huang\,
	Ying" <ying.huang@intel.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Borislav Petkov <bp@suse.de>,
	"linux-acpi\@vger.kernel.org" <linux-acpi@vger.kernel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] GHES: Fix cached error-status
Date: Mon, 26 Oct 2015 11:20:35 +0800	[thread overview]
Message-ID: <87611uz56k.fsf@yhuang-dev.intel.com> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F32B5DE60@ORSMSX114.amr.corp.intel.com> (Tony Luck's message of "Sat, 24 Oct 2015 07:05:15 +0800")

Hi, Tony,

"Luck, Tony" <tony.luck@intel.com> writes:
>> ping?
>
> I'm not actually sure that the code is wrong.  As you say it is a pretty strange loop.
>
> We seem to want to look at a bunch of conditions, and use "continue" to ignore
> bits until we find one that we like the look of.  Perhaps as soon as we do, we want
> to believe it to get our return value? Perhaps the code knows that we won't find
> another section that matches all the tests, so it isn't worth going around the loop
> again.
>
> Ying: You wrote this code 4 years ago. Any recollections of why it looks like it does?

Sorry for late.  I read the code again, and found the although the
original code is a little tricky, it actually works.

In ghes_estatus_caches[], for caches with same contents, the cache with
biggest (newest) cache->time_in should be the first.  So if we found one
cache with too small (old) cache->time_in, we can say there are no cache
with same contents and bigger (newer) cache->time_in, so that we can
make decision (break) earlier.

Best Regards,
Huang, Ying

  reply	other threads:[~2015-10-26  3:20 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-19 17:55 [PATCH] GHES: Fix cached error-status Davidlohr Bueso
2015-10-23 22:50 ` Davidlohr Bueso
2015-10-23 23:05   ` Luck, Tony
2015-10-26  3:20     ` Huang, Ying [this message]
2015-10-26  3:20       ` Huang, Ying
2015-10-26  4:30       ` Borislav Petkov
2015-10-26  4:30         ` Borislav Petkov
2015-10-26  5:43         ` Huang, Ying
2015-10-26  5:43           ` Huang, Ying

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