From: Cody P Schafer <cody@linux.vnet.ibm.com>
To: Linux MM <linux-mm@kvack.org>, David Hansen <dave@linux.vnet.ibm.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH v2 0/9] mm: zone & pgdat accessors plus some cleanup
Date: Thu, 17 Jan 2013 14:52:52 -0800 [thread overview]
Message-ID: <1358463181-17956-1-git-send-email-cody@linux.vnet.ibm.com> (raw)
Summaries:
1 - avoid repeating checks for section in page flags by adding a define.
2 - add & switch to zone_end_pfn() and zone_spans_pfn()
3 - adds zone_is_initialized() & zone_is_empty()
4 - adds a VM_BUG using zone_is_initialized() in __free_one_page()
5 - add pgdat_end_pfn() and pgdat_is_empty()
6 - add debugging message to VM_BUG check.
7 - add ensure_zone_is_initialized() (for memory_hotplug)
8 - use the above addition in memory_hotplug
9 - use pgdat_end_pfn()
As a general concern: spanned_pages & start_pfn (in pgdat & zone) are supposed
to be locked (via a seqlock) when read (due to changes to them via
memory_hotplug), but very few (only 1?) of their users appear to actually lock
them.
--
Since v1:
- drop zone+pgdat growth factoring (I use this in some WIP code to resign the
NUMA node a page belongs to, will send with that patchset)
- merge zone_end_pfn() & zone_spans_pfn() introduction & usage
- split zone_is_initialized() & zone_is_empty() out from the above.
- add a missing semicolon
include/linux/mm.h | 8 ++++++--
include/linux/mmzone.h | 34 +++++++++++++++++++++++++++++----
mm/compaction.c | 10 +++++-----
mm/kmemleak.c | 5 ++---
mm/memory_hotplug.c | 52 ++++++++++++++++++++++++++------------------------
mm/page_alloc.c | 31 +++++++++++++++++-------------
mm/vmstat.c | 2 +-
7 files changed, 89 insertions(+), 53 deletions(-)
--
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next reply other threads:[~2013-01-17 22:54 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-17 22:52 Cody P Schafer [this message]
2013-01-17 22:52 ` [PATCH 1/9] mm: add SECTION_IN_PAGE_FLAGS Cody P Schafer
2013-02-02 0:20 ` Andrew Morton
2013-02-05 22:23 ` Cody P Schafer
2013-01-17 22:52 ` [PATCH 2/9] mm: add & use zone_end_pfn() and zone_spans_pfn() Cody P Schafer
2013-01-17 22:52 ` [PATCH 3/9] mm: add zone_is_empty() and zone_is_initialized() Cody P Schafer
2013-01-17 22:52 ` [PATCH 4/9] mm/page_alloc: add a VM_BUG in __free_one_page() if the zone is uninitialized Cody P Schafer
2013-01-17 22:52 ` [PATCH 5/9] mmzone: add pgdat_{end_pfn,is_empty}() helpers & consolidate Cody P Schafer
2013-02-02 0:23 ` Andrew Morton
2013-01-17 22:52 ` [PATCH 6/9] mm/page_alloc: add informative debugging message in page_outside_zone_boundaries() Cody P Schafer
2013-02-02 0:28 ` Andrew Morton
2013-02-02 0:29 ` Andrew Morton
2013-02-05 22:20 ` Cody P Schafer
2013-01-17 22:52 ` [PATCH 7/9] mm: add helper ensure_zone_is_initialized() Cody P Schafer
2013-01-17 22:53 ` [PATCH 8/9] mm/memory_hotplug: use ensure_zone_is_initialized() Cody P Schafer
2013-01-17 22:53 ` [PATCH 9/9] mm/memory_hotplug: use pgdat_end_pfn() instead of open coding the same Cody P Schafer
2013-02-02 0:39 ` [PATCH v2 0/9] mm: zone & pgdat accessors plus some cleanup Andrew Morton
2013-02-05 22:59 ` Cody P Schafer
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