From: Sasha Levin <sasha.levin@oracle.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Davidlohr Bueso <dave@stgolabs.net>
Cc: Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Hugh Dickins <hughd@google.com>,
Andrea Arcangeli <aarcange@redhat.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Rik van Riel <riel@redhat.com>, Mel Gorman <mgorman@suse.de>,
Michal Hocko <mhocko@suse.cz>,
Ebru Akagunduz <ebru.akagunduz@gmail.com>,
Alex Thorlton <athorlton@sgi.com>,
David Rientjes <rientjes@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [RFC 0/6] the big khugepaged redesign
Date: Mon, 23 Feb 2015 17:58:53 -0500 [thread overview]
Message-ID: <54EBB0AD.8080902@oracle.com> (raw)
In-Reply-To: <20150223145619.64f3a225b914034a17d4f520@linux-foundation.org>
On 02/23/2015 05:56 PM, Andrew Morton wrote:
>>> Now I don't have any hard data to show how big these problems are, and I
>>> > > expect we will discuss this on LSF/MM (and hope somebody has such data [3]).
>>> > > But it's certain that e.g. SAP recommends to disable THPs [4] for their apps
>>> > > for performance reasons.
>> >
>> > There are plenty of examples of this, ie for Oracle:
>> >
>> > https://blogs.oracle.com/linux/entry/performance_issues_with_transparent_huge
> hm, five months ago and I don't recall seeing any followup to this.
> Does anyone know what's happening?
I'll dig it up.
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WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sasha.levin@oracle.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Davidlohr Bueso <dave@stgolabs.net>
Cc: Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Hugh Dickins <hughd@google.com>,
Andrea Arcangeli <aarcange@redhat.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Rik van Riel <riel@redhat.com>, Mel Gorman <mgorman@suse.de>,
Michal Hocko <mhocko@suse.cz>,
Ebru Akagunduz <ebru.akagunduz@gmail.com>,
Alex Thorlton <athorlton@sgi.com>,
David Rientjes <rientjes@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [RFC 0/6] the big khugepaged redesign
Date: Mon, 23 Feb 2015 17:58:53 -0500 [thread overview]
Message-ID: <54EBB0AD.8080902@oracle.com> (raw)
In-Reply-To: <20150223145619.64f3a225b914034a17d4f520@linux-foundation.org>
On 02/23/2015 05:56 PM, Andrew Morton wrote:
>>> Now I don't have any hard data to show how big these problems are, and I
>>> > > expect we will discuss this on LSF/MM (and hope somebody has such data [3]).
>>> > > But it's certain that e.g. SAP recommends to disable THPs [4] for their apps
>>> > > for performance reasons.
>> >
>> > There are plenty of examples of this, ie for Oracle:
>> >
>> > https://blogs.oracle.com/linux/entry/performance_issues_with_transparent_huge
> hm, five months ago and I don't recall seeing any followup to this.
> Does anyone know what's happening?
I'll dig it up.
next prev parent reply other threads:[~2015-02-23 22:59 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-23 12:58 [RFC 0/6] the big khugepaged redesign Vlastimil Babka
2015-02-23 12:58 ` Vlastimil Babka
2015-02-23 12:58 ` [RFC 1/6] mm, thp: stop preallocating hugepages in khugepaged Vlastimil Babka
2015-02-23 12:58 ` Vlastimil Babka
2015-02-23 12:58 ` [RFC 2/6] mm, thp: make khugepaged check for THP allocability before scanning Vlastimil Babka
2015-02-23 12:58 ` Vlastimil Babka
2015-02-23 12:58 ` [RFC 3/6] mm, thp: try fault allocations only if we expect them to succeed Vlastimil Babka
2015-02-23 12:58 ` Vlastimil Babka
2015-02-23 12:58 ` [RFC 4/6] mm, thp: move collapsing from khugepaged to task_work context Vlastimil Babka
2015-02-23 12:58 ` Vlastimil Babka
2015-02-23 14:25 ` Peter Zijlstra
2015-02-23 14:25 ` Peter Zijlstra
2015-02-23 12:58 ` [RFC 5/6] mm, thp: wakeup khugepaged when THP allocation fails Vlastimil Babka
2015-02-23 12:58 ` Vlastimil Babka
2015-02-23 12:58 ` [RFC 6/6] mm, thp: remove no longer needed khugepaged code Vlastimil Babka
2015-02-23 12:58 ` Vlastimil Babka
2015-02-23 21:03 ` [RFC 0/6] the big khugepaged redesign Andi Kleen
2015-02-23 21:03 ` Andi Kleen
2015-02-23 22:46 ` Davidlohr Bueso
2015-02-23 22:46 ` Davidlohr Bueso
2015-02-23 22:56 ` Andrew Morton
2015-02-23 22:56 ` Andrew Morton
2015-02-23 22:58 ` Sasha Levin [this message]
2015-02-23 22:58 ` Sasha Levin
2015-02-24 10:32 ` Vlastimil Babka
2015-02-24 10:32 ` Vlastimil Babka
2015-02-24 11:24 ` Andrea Arcangeli
2015-02-24 11:24 ` Andrea Arcangeli
2015-02-24 11:45 ` Andrea Arcangeli
2015-02-24 11:45 ` Andrea Arcangeli
2015-02-25 12:42 ` Vlastimil Babka
2015-02-25 12:42 ` Vlastimil Babka
2015-03-05 16:30 ` Vlastimil Babka
2015-03-05 16:30 ` Vlastimil Babka
2015-03-05 16:52 ` Andres Freund
2015-03-05 16:52 ` Andres Freund
2015-03-05 17:01 ` Vlastimil Babka
2015-03-05 17:01 ` Vlastimil Babka
2015-03-05 17:07 ` Andres Freund
2015-03-05 17:07 ` Andres Freund
2015-03-06 0:21 ` Andres Freund
2015-03-06 0:21 ` Andres Freund
2015-03-06 7:50 ` Vlastimil Babka
2015-03-06 7:50 ` Vlastimil Babka
2015-03-09 3:17 ` Vlastimil Babka
2015-03-09 3:17 ` Vlastimil Babka
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