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From: Michal Hocko <mhocko@kernel.org>
To: kernel test robot <oliver.sang@intel.com>
Cc: Alexander Potapenko <glider@google.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>,
	Christoph Lameter <cl@linux.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Kostya Serebryany <kcc@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Sandeep Patil <sspatil@android.com>,
	Laura Abbott <labbott@redhat.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	Jann Horn <jannh@google.com>, Mark Rutland <mark.rutland@arm.com>,
	Marco Elver <elver@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	lkp@lists.01.org, OTC LSE PnP <otc.lse.pnp@intel.com>
Subject: Re: [mm]  6471384af2: phoronix-test-suite.darktable.Masskrug.CPU-only.seconds 10.2% regression
Date: Thu, 9 Apr 2020 16:03:31 +0200	[thread overview]
Message-ID: <20200409140331.GK18386@dhcp22.suse.cz> (raw)
In-Reply-To: <20200409135029.GA2072@xsang-OptiPlex-9020>

On Thu 09-04-20 21:50:29, kernel test robot wrote:
> Greeting,
> 
> FYI, we noticed a 10.2% regression of phoronix-test-suite.darktable.Masskrug.CPU-only.seconds due to commit:
> 
> 
> commit: 6471384af2a6530696fc0203bafe4de41a23c9ef ("mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
[...]
> CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
> CONFIG_INIT_ON_FREE_DEFAULT_ON=y

So the feature is enabled by default and therefore this is no
regression. The feature is expected to have an overhead. It is nice to
see that quantified. These numbers roughly match those presented when
the feature was enabled.
-- 
Michal Hocko
SUSE Labs

WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org>
To: lkp@lists.01.org
Subject: Re: [mm] 6471384af2: phoronix-test-suite.darktable.Masskrug.CPU-only.seconds 10.2% regression
Date: Thu, 09 Apr 2020 16:03:31 +0200	[thread overview]
Message-ID: <20200409140331.GK18386@dhcp22.suse.cz> (raw)
In-Reply-To: <20200409135029.GA2072@xsang-OptiPlex-9020>

[-- Attachment #1: Type: text/plain, Size: 733 bytes --]

On Thu 09-04-20 21:50:29, kernel test robot wrote:
> Greeting,
> 
> FYI, we noticed a 10.2% regression of phoronix-test-suite.darktable.Masskrug.CPU-only.seconds due to commit:
> 
> 
> commit: 6471384af2a6530696fc0203bafe4de41a23c9ef ("mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
[...]
> CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
> CONFIG_INIT_ON_FREE_DEFAULT_ON=y

So the feature is enabled by default and therefore this is no
regression. The feature is expected to have an overhead. It is nice to
see that quantified. These numbers roughly match those presented when
the feature was enabled.
-- 
Michal Hocko
SUSE Labs

  reply	other threads:[~2020-04-09 14:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-09 13:50 [mm] 6471384af2: phoronix-test-suite.darktable.Masskrug.CPU-only.seconds 10.2% regression kernel test robot
2020-04-09 13:50 ` kernel test robot
2020-04-09 14:03 ` Michal Hocko [this message]
2020-04-09 14:03   ` Michal Hocko

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