From: Greg KH <greg@kroah.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Stable <stable@vger.kernel.org>, Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 00/34] Memory management performance backports for -stable V2
Date: Wed, 25 Jul 2012 15:30:57 -0700 [thread overview]
Message-ID: <20120725223057.GA4253@kroah.com> (raw)
In-Reply-To: <1343050727-3045-1-git-send-email-mgorman@suse.de>
On Mon, Jul 23, 2012 at 02:38:13PM +0100, Mel Gorman wrote:
> Changelog since V1
> o Expand some of the notes (jrnieder)
> o Correct upstream commit SHA1 (hugh)
>
> This series is related to the new addition to stable_kernel_rules.txt
>
> - Serious issues as reported by a user of a distribution kernel may also
> be considered if they fix a notable performance or interactivity issue.
> As these fixes are not as obvious and have a higher risk of a subtle
> regression they should only be submitted by a distribution kernel
> maintainer and include an addendum linking to a bugzilla entry if it
> exists and additional information on the user-visible impact.
>
> All of these patches have been backported to a distribution kernel and
> address some sort of performance issue in the VM. As they are not all
> obvious, I've added a "Stable note" to the top of each patch giving
> additional information on why the patch was backported. Lets see where
> the boundaries lie on how this new rule is interpreted in practice :).
>
> Patch 1 Performance fix for tmpfs
> Patch 2 Memory hotadd fix
> Patch 3 Reduce boot time on large machines
> Patches 4-5 Reduce stalls for wait_iff_congested
> Patches 6-8 Reduce excessive reclaim of slab objects which for some workloads
> will reduce the amount of IO required
> Patches 9-10 limits the amount of page reclaim when THP/Compaction is active.
> Excessive reclaim in low memory situations can lead to stalls some
> of which are user visible.
> Patches 11-19 reduce the amount of churn of the LRU lists. Poor reclaim
> decisions can impair workloads in different ways and there have
> been complaints recently the reclaim decisions of modern kernels
> are worse than older ones.
> Patches 20-21 reduce the amount of CPU kswapd uses in some cases. This
> is harder to trigger but were developed due to bug reports about
> 100% CPU usage from kswapd.
> Patches 22-25 are mostly related to interactivity when THP is enabled.
> Patches 26-30 are also related to page reclaim decisions, particularly
> the residency of mapped pages.
> Patches 31-34 fix a major page allocator performance regression
>
> All of the patches will apply to 3.0-stable but the ordering of the
> patches is such that applying them to 3.2-stable and 3.4-stable should
> be straight-forward.
I can't find any of these that should have gone to 3.4-stable, given
that they all were included in 3.4 already, right?
I've queued up the whole lot for the 3.0-stable tree, thanks so much for
providing them.
greg k-h
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next prev parent reply other threads:[~2012-07-25 22:30 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-23 13:38 Mel Gorman
2012-07-23 13:38 ` [PATCH 01/34] mm: vmstat: cache align vm_stat Mel Gorman
2012-07-23 13:38 ` [PATCH 02/34] mm: memory hotplug: Check if pages are correctly reserved on a per-section basis Mel Gorman
2012-07-23 13:38 ` [PATCH 03/34] mm: Reduce the amount of work done when updating min_free_kbytes Mel Gorman
2012-07-24 22:47 ` Greg KH
2012-07-25 7:57 ` Mel Gorman
2012-07-23 13:38 ` [PATCH 04/34] mm: vmscan: fix force-scanning small targets without swap Mel Gorman
2012-07-23 13:38 ` [PATCH 05/34] vmscan: clear ZONE_CONGESTED for zone with good watermark Mel Gorman
2012-07-23 13:38 ` [PATCH 06/34] vmscan: add shrink_slab tracepoints Mel Gorman
2012-07-23 13:38 ` [PATCH 07/34] vmscan: shrinker->nr updates race and go wrong Mel Gorman
2012-07-23 13:38 ` [PATCH 08/34] vmscan: reduce wind up shrinker->nr when shrinker can't do work Mel Gorman
2012-07-23 13:38 ` [PATCH 09/34] mm: limit direct reclaim for higher order allocations Mel Gorman
2012-07-23 13:38 ` [PATCH 10/34] mm: Abort reclaim/compaction if compaction can proceed Mel Gorman
2012-07-23 13:38 ` [PATCH 11/34] mm: compaction: trivial clean up in acct_isolated() Mel Gorman
2012-07-23 13:38 ` [PATCH 12/34] mm: change isolate mode from #define to bitwise type Mel Gorman
2012-07-23 13:38 ` [PATCH 13/34] mm: compaction: make isolate_lru_page() filter-aware Mel Gorman
2012-07-23 13:38 ` [PATCH 14/34] mm: zone_reclaim: " Mel Gorman
2012-07-23 13:38 ` [PATCH 15/34] mm: migration: clean up unmap_and_move() Mel Gorman
2012-07-25 15:45 ` Greg KH
2012-07-25 16:04 ` Mel Gorman
2012-07-25 18:03 ` Greg KH
2012-07-23 13:38 ` [PATCH 16/34] mm: compaction: Allow compaction to isolate dirty pages Mel Gorman
2012-07-25 15:47 ` Greg KH
2012-07-25 16:07 ` Mel Gorman
2012-07-23 13:38 ` [PATCH 17/34] mm: compaction: Determine if dirty pages can be migrated without blocking within ->migratepage Mel Gorman
2012-07-23 13:38 ` [PATCH 18/34] mm: page allocator: Do not call direct reclaim for THP allocations while compaction is deferred Mel Gorman
2012-07-23 13:38 ` [PATCH 19/34] mm: compaction: make isolate_lru_page() filter-aware again Mel Gorman
2012-07-23 13:38 ` [PATCH 20/34] kswapd: avoid unnecessary rebalance after an unsuccessful balancing Mel Gorman
2012-07-23 13:38 ` [PATCH 21/34] kswapd: assign new_order and new_classzone_idx after wakeup in sleeping Mel Gorman
2012-07-23 13:38 ` [PATCH 22/34] mm: compaction: Introduce sync-light migration for use by compaction Mel Gorman
2012-07-23 13:38 ` [PATCH 23/34] mm: vmscan: When reclaiming for compaction, ensure there are sufficient free pages available Mel Gorman
2012-07-23 13:38 ` [PATCH 24/34] mm: vmscan: Do not OOM if aborting reclaim to start compaction Mel Gorman
2012-07-23 13:38 ` [PATCH 25/34] mm: vmscan: Check if reclaim should really abort even if compaction_ready() is true for one zone Mel Gorman
2012-07-25 19:51 ` Greg KH
2012-07-23 13:38 ` [PATCH 26/34] vmscan: promote shared file mapped pages Mel Gorman
2012-07-23 13:38 ` [PATCH 27/34] vmscan: activate executable pages after first usage Mel Gorman
2012-07-23 13:38 ` [PATCH 28/34] mm/vmscan.c: consider swap space when deciding whether to continue reclaim Mel Gorman
2012-07-23 13:38 ` [PATCH 29/34] mm: test PageSwapBacked in lumpy reclaim Mel Gorman
2012-07-23 13:38 ` [PATCH 30/34] mm: vmscan: Do not force kswapd to scan small targets Mel Gorman
2012-07-25 19:59 ` Greg KH
2012-07-25 21:35 ` Mel Gorman
2012-07-25 21:44 ` Greg KH
2012-07-23 13:38 ` [PATCH 31/34] cpusets: avoid looping when storing to mems_allowed if one node remains set Mel Gorman
2012-07-23 13:38 ` [PATCH 32/34] cpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask Mel Gorman
2012-07-23 13:38 ` [PATCH 33/34] cpuset: mm: Reduce large amounts of memory barrier related damage v3 Mel Gorman
2012-07-23 13:38 ` [PATCH 34/34] mm/hugetlb: fix warning in alloc_huge_page/dequeue_huge_page_vma Mel Gorman
2012-07-24 5:58 ` [PATCH 00/34] Memory management performance backports for -stable V2 Mike Galbraith
2012-07-24 8:10 ` Mel Gorman
2012-07-24 13:18 ` Hillf Danton
2012-07-24 13:27 ` Mel Gorman
2012-07-24 13:34 ` Hillf Danton
2012-07-24 13:53 ` Mel Gorman
2012-07-24 14:11 ` Hillf Danton
2012-07-24 13:52 ` Mike Galbraith
2012-07-24 14:18 ` Hillf Danton
2012-07-24 14:41 ` Mike Galbraith
2012-07-25 22:30 ` Greg KH [this message]
2012-07-25 22:48 ` Mel Gorman
2012-07-30 1:13 ` Ben Hutchings
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