From: Mel Gorman <mgorman@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Waiman Long <waiman.long@hp.com>, Nathan Zimmer <nzimmer@sgi.com>,
Dave Hansen <dave.hansen@intel.com>,
Scott Norton <scott.norton@hp.com>,
Daniel J Blueman <daniel@numascale.com>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/13] Parallel struct page initialisation v4
Date: Wed, 6 May 2015 08:12:46 +0100 [thread overview]
Message-ID: <20150506071246.GF2462@suse.de> (raw)
In-Reply-To: <20150505152549.037679566fad8c593df176ed@linux-foundation.org>
On Tue, May 05, 2015 at 03:25:49PM -0700, Andrew Morton wrote:
> On Tue, 5 May 2015 23:13:29 +0100 Mel Gorman <mgorman@suse.de> wrote:
>
> > > Alternatively, the page allocator can go off and synchronously
> > > initialize some pageframes itself. Keep doing that until the
> > > allocation attempt succeeds.
> > >
> >
> > That was rejected during review of earlier attempts at this feature on
> > the grounds that it impacted allocator fast paths.
>
> eh? Changes are only needed on the allocation-attempt-failed path,
> which is slow-path.
We'd have to distinguish between falling back to other zones because the
high zone is artifically exhausted and normal ALLOC_BATCH exhaustion. We'd
also have to avoid falling back to remote nodes prematurely. While I have
not tried an implementation, I expected they would need to be in the fast
paths unless I used jump labels to get around it. I'm going to try altering
when we initialise instead so that it happens earlier.
--
Mel Gorman
SUSE Labs
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WARNING: multiple messages have this Message-ID (diff)
From: Mel Gorman <mgorman@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Waiman Long <waiman.long@hp.com>, Nathan Zimmer <nzimmer@sgi.com>,
Dave Hansen <dave.hansen@intel.com>,
Scott Norton <scott.norton@hp.com>,
Daniel J Blueman <daniel@numascale.com>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/13] Parallel struct page initialisation v4
Date: Wed, 6 May 2015 08:12:46 +0100 [thread overview]
Message-ID: <20150506071246.GF2462@suse.de> (raw)
In-Reply-To: <20150505152549.037679566fad8c593df176ed@linux-foundation.org>
On Tue, May 05, 2015 at 03:25:49PM -0700, Andrew Morton wrote:
> On Tue, 5 May 2015 23:13:29 +0100 Mel Gorman <mgorman@suse.de> wrote:
>
> > > Alternatively, the page allocator can go off and synchronously
> > > initialize some pageframes itself. Keep doing that until the
> > > allocation attempt succeeds.
> > >
> >
> > That was rejected during review of earlier attempts at this feature on
> > the grounds that it impacted allocator fast paths.
>
> eh? Changes are only needed on the allocation-attempt-failed path,
> which is slow-path.
We'd have to distinguish between falling back to other zones because the
high zone is artifically exhausted and normal ALLOC_BATCH exhaustion. We'd
also have to avoid falling back to remote nodes prematurely. While I have
not tried an implementation, I expected they would need to be in the fast
paths unless I used jump labels to get around it. I'm going to try altering
when we initialise instead so that it happens earlier.
--
Mel Gorman
SUSE Labs
next prev parent reply other threads:[~2015-05-06 7:12 UTC|newest]
Thread overview: 168+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-28 14:36 [PATCH 0/13] Parallel struct page initialisation v4 Mel Gorman
2015-04-28 14:36 ` Mel Gorman
2015-04-28 14:36 ` [PATCH 01/13] memblock: Introduce a for_each_reserved_mem_region iterator Mel Gorman
2015-04-28 14:36 ` Mel Gorman
2015-04-28 14:36 ` [PATCH 02/13] mm: meminit: Move page initialization into a separate function Mel Gorman
2015-04-28 14:36 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 03/13] mm: meminit: Only set page reserved in the memblock region Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-05-22 20:31 ` Tony Luck
2015-05-22 20:31 ` Tony Luck
2015-05-26 10:22 ` Mel Gorman
2015-05-26 10:22 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 04/13] mm: page_alloc: Pass PFN to __free_pages_bootmem Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-05-01 9:20 ` [PATCH] mm: page_alloc: pass PFN to __free_pages_bootmem -fix Mel Gorman
2015-05-01 9:20 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 05/13] mm: meminit: Make __early_pfn_to_nid SMP-safe and introduce meminit_pfn_in_nid Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 06/13] mm: meminit: Inline some helper functions Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-30 21:53 ` Andrew Morton
2015-04-30 21:53 ` Andrew Morton
2015-04-30 21:55 ` Andrew Morton
2015-04-30 21:55 ` Andrew Morton
2015-05-04 8:33 ` Michal Hocko
2015-05-04 8:33 ` Michal Hocko
2015-05-04 8:38 ` Michal Hocko
2015-05-04 8:38 ` Michal Hocko
2015-04-28 14:37 ` [PATCH 07/13] mm: meminit: Initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-29 21:19 ` Andrew Morton
2015-04-29 21:19 ` Andrew Morton
2015-04-30 8:45 ` Mel Gorman
2015-04-30 8:45 ` Mel Gorman
2015-05-01 9:21 ` [PATCH] mm: meminit: Initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set -fix Mel Gorman
2015-05-01 9:21 ` Mel Gorman
2015-07-14 15:54 ` 4.2-rc2: hitting "file-max limit 8192 reached" Dave Hansen
2015-07-14 15:54 ` Dave Hansen
2015-07-14 16:15 ` Andrew Morton
2015-07-14 16:15 ` Andrew Morton
2015-07-15 10:45 ` Mel Gorman
2015-07-15 10:45 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 08/13] mm: meminit: Initialise remaining struct pages in parallel with kswapd Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 09/13] mm: meminit: Minimise number of pfn->page lookups during initialisation Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 10/13] x86: mm: Enable deferred struct page initialisation on x86-64 Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 11/13] mm: meminit: Free pages in large chunks where possible Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 12/13] mm: meminit: Reduce number of times pageblocks are set during struct page init Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-05-01 9:23 ` [PATCH] mm: meminit: Reduce number of times pageblocks are set during struct page init -fix Mel Gorman
2015-05-01 9:23 ` Mel Gorman
2015-04-28 14:37 ` [PATCH 13/13] mm: meminit: Remove mminit_verify_page_links Mel Gorman
2015-04-28 14:37 ` Mel Gorman
2015-04-28 16:06 ` [PATCH 0/13] Parallel struct page initialisation v4 Pekka Enberg
2015-04-28 16:06 ` Pekka Enberg
2015-04-28 18:38 ` nzimmer
2015-04-28 18:38 ` nzimmer
2015-04-30 16:10 ` Daniel J Blueman
2015-04-30 16:10 ` Daniel J Blueman
2015-04-30 17:12 ` nzimmer
2015-04-30 17:12 ` nzimmer
2015-04-30 17:28 ` Mel Gorman
2015-04-30 17:28 ` Mel Gorman
2015-05-02 11:52 ` Elliott, Robert (Server Storage)
2015-05-02 11:52 ` Elliott, Robert (Server Storage)
2015-05-02 11:52 ` Elliott, Robert (Server Storage)
2015-04-29 1:16 ` Waiman Long
2015-04-29 1:16 ` Waiman Long
2015-05-01 22:02 ` Waiman Long
2015-05-01 22:02 ` Waiman Long
2015-05-02 0:09 ` Waiman Long
2015-05-02 0:09 ` Waiman Long
2015-05-02 8:52 ` Daniel J Blueman
2015-05-02 8:52 ` Daniel J Blueman
2015-05-02 16:05 ` Daniel J Blueman
2015-05-02 16:05 ` Daniel J Blueman
2015-05-04 21:30 ` Andrew Morton
2015-05-04 21:30 ` Andrew Morton
2015-05-05 3:32 ` Waiman Long
2015-05-05 3:32 ` Waiman Long
2015-05-05 10:45 ` Mel Gorman
2015-05-05 10:45 ` Mel Gorman
2015-05-05 13:55 ` Waiman Long
2015-05-05 13:55 ` Waiman Long
2015-05-05 14:31 ` Mel Gorman
2015-05-05 14:31 ` Mel Gorman
2015-05-05 15:01 ` Waiman Long
2015-05-05 15:01 ` Waiman Long
2015-05-06 3:39 ` Waiman Long
2015-05-06 3:39 ` Waiman Long
2015-05-06 0:55 ` Waiman Long
2015-05-06 0:55 ` Waiman Long
2015-05-05 20:02 ` Andrew Morton
2015-05-05 20:02 ` Andrew Morton
2015-05-05 22:13 ` Mel Gorman
2015-05-05 22:13 ` Mel Gorman
2015-05-05 22:25 ` Andrew Morton
2015-05-05 22:25 ` Andrew Morton
2015-05-06 7:12 ` Mel Gorman [this message]
2015-05-06 7:12 ` Mel Gorman
2015-05-06 10:22 ` Mel Gorman
2015-05-06 10:22 ` Mel Gorman
2015-05-06 12:05 ` Mel Gorman
2015-05-06 12:05 ` Mel Gorman
2015-05-06 17:58 ` Waiman Long
2015-05-06 17:58 ` Waiman Long
2015-05-07 2:37 ` Waiman Long
2015-05-07 2:37 ` Waiman Long
2015-05-07 7:21 ` Mel Gorman
2015-05-07 7:21 ` Mel Gorman
2015-05-06 1:21 ` Waiman Long
2015-05-06 1:21 ` Waiman Long
2015-05-06 2:01 ` Andrew Morton
2015-05-06 2:01 ` Andrew Morton
2015-05-07 7:25 ` [PATCH] mm: meminit: Finish initialisation of struct pages before basic setup Mel Gorman
2015-05-07 7:25 ` Mel Gorman
2015-05-07 22:09 ` Andrew Morton
2015-05-07 22:09 ` Andrew Morton
2015-05-07 22:52 ` Mel Gorman
2015-05-07 22:52 ` Mel Gorman
2015-05-07 23:02 ` Andrew Morton
2015-05-07 23:02 ` Andrew Morton
2015-05-13 15:53 ` nzimmer
2015-05-13 15:53 ` nzimmer
2015-05-13 16:31 ` Mel Gorman
2015-05-13 16:31 ` Mel Gorman
2015-05-14 10:03 ` Daniel J Blueman
2015-05-14 10:03 ` Daniel J Blueman
2015-05-14 15:47 ` nzimmer
2015-05-14 15:47 ` nzimmer
2015-05-19 18:31 ` nzimmer
2015-05-19 18:31 ` nzimmer
2015-05-19 19:06 ` Mel Gorman
2015-05-19 19:06 ` Mel Gorman
2015-05-22 6:30 ` Daniel J Blueman
2015-05-22 6:30 ` Daniel J Blueman
2015-05-22 9:33 ` Mel Gorman
2015-05-22 9:33 ` Mel Gorman
2015-05-22 17:14 ` Waiman Long
2015-05-22 17:14 ` Waiman Long
2015-05-22 21:43 ` Davidlohr Bueso
2015-05-22 21:43 ` Davidlohr Bueso
2015-05-23 3:49 ` Daniel J Blueman
2015-05-23 3:49 ` Daniel J Blueman
2015-06-24 22:50 ` Nathan Zimmer
2015-06-24 22:50 ` Nathan Zimmer
2015-06-25 20:48 ` Mel Gorman
2015-06-25 20:48 ` Mel Gorman
2015-06-25 20:57 ` Mel Gorman
2015-06-25 20:57 ` Mel Gorman
2015-06-25 21:37 ` Nathan Zimmer
2015-06-25 21:37 ` Nathan Zimmer
2015-06-25 21:34 ` Nathan Zimmer
2015-06-25 21:34 ` Nathan Zimmer
2015-06-25 21:44 ` [RFC] kthread_create_on_node is failing to honor the node choice Nathan Zimmer
2015-06-26 1:08 ` Lai Jiangshan
2015-07-09 22:12 ` Andrew Morton
2015-07-10 14:26 ` Mel Gorman
2015-07-10 17:34 ` Nathan Zimmer
2015-06-26 10:16 ` [PATCH] mm: meminit: Finish initialisation of struct pages before basic setup Mel Gorman
2015-06-26 10:16 ` Mel Gorman
2015-07-06 17:45 ` Daniel J Blueman
2015-07-06 17:45 ` Daniel J Blueman
2015-07-09 17:49 ` Nathan Zimmer
2015-07-09 17:49 ` Nathan Zimmer
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