From: Peter Zijlstra <peterz@infradead.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Alex Thorlton <athorlton@sgi.com>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
Ingo Molnar <mingo@kernel.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Hugh Dickins <hughd@google.com>, Bob Liu <lliubbo@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-mm@kvack.org
Subject: Re: [BUG] mm, thp: khugepaged can't allocate on requested node when confined to a cpuset
Date: Tue, 21 Oct 2014 12:59:34 +0200 [thread overview]
Message-ID: <20141021105934.GV23531@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <54385635.5020709@suse.cz>
On Fri, Oct 10, 2014 at 11:57:09PM +0200, Vlastimil Babka wrote:
> Hm I haven't seen the code yet, but is perhaps the NUMA scanning working
> similarly enough that a single scanner could handle both the NUMA and THP
> bits to save time?
IIRC the THP thing doesn't need the fault thing, which makes it an
entirely different beast. Then again, we do walk the actual page-tables
through change_protection, but changing that means we have to duplicate
all that code, then again, maybe the current THP stuff already carries
something like that.
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WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Alex Thorlton <athorlton@sgi.com>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
Ingo Molnar <mingo@kernel.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Hugh Dickins <hughd@google.com>, Bob Liu <lliubbo@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-mm@kvack.org
Subject: Re: [BUG] mm, thp: khugepaged can't allocate on requested node when confined to a cpuset
Date: Tue, 21 Oct 2014 12:59:34 +0200 [thread overview]
Message-ID: <20141021105934.GV23531@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <54385635.5020709@suse.cz>
On Fri, Oct 10, 2014 at 11:57:09PM +0200, Vlastimil Babka wrote:
> Hm I haven't seen the code yet, but is perhaps the NUMA scanning working
> similarly enough that a single scanner could handle both the NUMA and THP
> bits to save time?
IIRC the THP thing doesn't need the fault thing, which makes it an
entirely different beast. Then again, we do walk the actual page-tables
through change_protection, but changing that means we have to duplicate
all that code, then again, maybe the current THP stuff already carries
something like that.
next prev parent reply other threads:[~2014-10-21 10:59 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-08 19:10 [BUG] mm, thp: khugepaged can't allocate on requested node when confined to a cpuset Alex Thorlton
2014-10-08 19:10 ` Alex Thorlton
2014-10-10 9:20 ` Peter Zijlstra
2014-10-10 9:20 ` Peter Zijlstra
2014-10-10 18:56 ` Alex Thorlton
2014-10-10 18:56 ` Alex Thorlton
2014-10-10 21:57 ` Vlastimil Babka
2014-10-10 21:57 ` Vlastimil Babka
2014-10-14 14:58 ` Alex Thorlton
2014-10-14 14:58 ` Alex Thorlton
2014-10-21 10:59 ` Peter Zijlstra [this message]
2014-10-21 10:59 ` Peter Zijlstra
2014-10-21 10:55 ` Peter Zijlstra
2014-10-21 10:55 ` Peter Zijlstra
2014-10-21 16:25 ` Alex Thorlton
2014-10-21 16:25 ` Alex Thorlton
2014-10-14 11:48 ` Kirill A. Shutemov
2014-10-14 11:48 ` Kirill A. Shutemov
2014-10-14 14:54 ` Peter Zijlstra
2014-10-14 14:54 ` Peter Zijlstra
2014-10-14 15:31 ` Rik van Riel
2014-10-14 15:31 ` Rik van Riel
2014-10-14 17:38 ` Kirill A. Shutemov
2014-10-14 17:38 ` Kirill A. Shutemov
2014-10-21 10:17 ` Peter Zijlstra
2014-10-21 10:17 ` Peter Zijlstra
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