From: Dave Hansen <dave.hansen@intel.com>
To: Michal Hocko <mhocko@kernel.org>,
Alexander Duyck <alexander.duyck@gmail.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
alexander.h.duyck@intel.com, pavel.tatashin@microsoft.com,
akpm@linux-foundation.org, mingo@kernel.org,
kirill.shutemov@linux.intel.com
Subject: Re: [PATCH v2 1/2] mm: Move page struct poisoning to CONFIG_DEBUG_VM_PAGE_INIT_POISON
Date: Thu, 6 Sep 2018 07:59:03 -0700 [thread overview]
Message-ID: <0c1c36f7-f45a-8fe9-dd52-0f60b42064a9@intel.com> (raw)
In-Reply-To: <20180906054735.GJ14951@dhcp22.suse.cz>
On 09/05/2018 10:47 PM, Michal Hocko wrote:
> why do you have to keep DEBUG_VM enabled for workloads where the boot
> time matters so much that few seconds matter?
There are a number of distributions that run with it enabled in the
default build. Fedora, for one. We've basically assumed for a while
that we have to live with it in production environments.
So, where does leave us? I think we either need a _generic_ debug
option like:
CONFIG_DEBUG_VM_SLOW_AS_HECK
under which we can put this an other really slow VM debugging. Or, we
need some kind of boot-time parameter to trigger the extra checking
instead of a new CONFIG option.
next prev parent reply other threads:[~2018-09-06 14:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-05 21:13 [PATCH v2 0/2] Address issues slowing memory init Alexander Duyck
2018-09-05 21:13 ` [PATCH v2 1/2] mm: Move page struct poisoning to CONFIG_DEBUG_VM_PAGE_INIT_POISON Alexander Duyck
2018-09-05 21:22 ` Pasha Tatashin
2018-09-05 21:29 ` Alexander Duyck
2018-09-05 21:38 ` Pasha Tatashin
2018-09-05 21:54 ` Alexander Duyck
2018-09-05 21:34 ` Dave Hansen
2018-09-06 5:47 ` Michal Hocko
2018-09-06 14:59 ` Dave Hansen [this message]
2018-09-06 15:13 ` Michal Hocko
2018-09-06 15:41 ` Alexander Duyck
2018-09-06 16:12 ` Pasha Tatashin
2018-09-06 17:07 ` Dave Hansen
2018-09-06 18:08 ` Michal Hocko
2018-09-06 17:03 ` Michal Hocko
2018-09-06 17:23 ` Pasha Tatashin
2018-09-06 16:09 ` Dave Hansen
2018-09-06 17:08 ` Michal Hocko
2018-09-05 21:13 ` [PATCH v2 2/2] mm: Create non-atomic version of SetPageReserved for init use Alexander Duyck
2018-09-06 5:49 ` Michal Hocko
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