From: Jon Tollefson <kniht@us.ibm.com>
To: Andy Whitcroft <apw@shadowen.org>
Cc: Jon Tollefson <kniht@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org,
linux-mm@kvack.org, Nick Piggin <npiggin@suse.de>,
Nishanth Aravamudan <nacc@us.ibm.com>,
Adam Litke <agl@linux.vnet.ibm.com>
Subject: Re: 2.6.26-rc5-mm3: BUG large value for HugePages_Rsvd
Date: Thu, 19 Jun 2008 22:18:24 -0500 [thread overview]
Message-ID: <485B2180.10507@us.ibm.com> (raw)
In-Reply-To: <20080619171644.GC13275@shadowen.org>
Andy Whitcroft wrote:
> On Thu, Jun 19, 2008 at 11:27:47AM -0500, Jon Tollefson wrote:
>
>> After running some of the libhugetlbfs tests the value for
>> /proc/meminfo/HugePages_Rsvd becomes really large. It looks like it has
>> wrapped backwards from zero.
>> Below is the sequence I used to run one of the tests that causes this;
>> the tests passes for what it is intended to test but leaves a large
>> value for reserved pages and that seemed strange to me.
>> test run on ppc64 with 16M huge pages
>>
>
> Yes Adam reported that here yesterday, he found it in his hugetlfs testing.
> I have done some investigation on it and it is being triggered by a bug in
> the private reservation tracking patches. It is triggered by the hugetlb
> test which causes some complex vma splits to occur on a private mapping.
>
sorry I missed that
> I believe I have the underlying problem nailed and do have some nearly
> complete patches for this and they should be in a postable state by
> tommorrow.
>
Cool.
> -apw
>
Jon
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next prev parent reply other threads:[~2008-06-20 3:18 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-12 5:59 2.6.26-rc5-mm3 Andrew Morton
2008-06-12 7:58 ` 2.6.26-rc5-mm3: kernel BUG at mm/vmscan.c:510 Alexey Dobriyan
2008-06-12 8:22 ` Andrew Morton
2008-06-12 8:23 ` Alexey Dobriyan
2008-06-12 8:44 ` [BUG] 2.6.26-rc5-mm3 kernel BUG at mm/filemap.c:575! Kamalesh Babulal
2008-06-12 8:57 ` Andrew Morton
2008-06-12 11:20 ` KAMEZAWA Hiroyuki
2008-06-13 1:44 ` [PATCH] fix double unlock_page() in " KAMEZAWA Hiroyuki
2008-06-13 2:13 ` Andrew Morton
2008-06-13 15:30 ` Lee Schermerhorn
2008-06-15 3:59 ` Kamalesh Babulal
2008-06-16 14:49 ` Lee Schermerhorn
2008-06-17 2:32 ` KAMEZAWA Hiroyuki
2008-06-17 15:26 ` Lee Schermerhorn
2008-06-13 4:34 ` Valdis.Kletnieks
2008-06-14 13:32 ` Kamalesh Babulal
2008-06-12 11:38 ` [BUG] " Nick Piggin
2008-06-13 0:25 ` KAMEZAWA Hiroyuki
2008-06-13 4:18 ` Valdis.Kletnieks
2008-06-13 7:16 ` Andrew Morton
2008-06-12 23:32 ` 2.6.26-rc5-mm3 Byron Bradley
2008-06-12 23:55 ` 2.6.26-rc5-mm3 Daniel Walker
2008-06-13 0:04 ` 2.6.26-rc5-mm3 Byron Bradley
2008-06-18 17:55 ` 2.6.26-rc5-mm3 Daniel Walker
2008-06-19 9:13 ` 2.6.26-rc5-mm3 Ingo Molnar
2008-06-19 14:39 ` 2.6.26-rc5-mm3 Daniel Walker
2008-06-17 7:35 ` [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3 Daisuke Nishimura
2008-06-17 7:47 ` [Bad page] trying to free locked page? (Re: [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3) Daisuke Nishimura
2008-06-17 9:03 ` KAMEZAWA Hiroyuki
2008-06-17 9:14 ` KOSAKI Motohiro
2008-06-17 9:15 ` Daisuke Nishimura
2008-06-17 18:29 ` Lee Schermerhorn
2008-06-17 20:00 ` [PATCH] unevictable mlocked pages: initialize mm member of munlock mm_walk structure Lee Schermerhorn
2008-06-18 3:33 ` KOSAKI Motohiro
2008-06-18 2:40 ` [Bad page] trying to free locked page? (Re: [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3) Daisuke Nishimura
2008-06-17 15:34 ` KOSAKI Motohiro
2008-06-18 2:32 ` Daisuke Nishimura
2008-06-18 10:20 ` KOSAKI Motohiro
2008-06-18 9:40 ` [Experimental][PATCH] putback_lru_page rework KAMEZAWA Hiroyuki
2008-06-18 11:36 ` KOSAKI Motohiro
2008-06-18 11:55 ` KAMEZAWA Hiroyuki
2008-06-19 8:00 ` Daisuke Nishimura
2008-06-19 8:24 ` KAMEZAWA Hiroyuki
2008-06-18 14:50 ` Daisuke Nishimura
2008-06-18 18:21 ` Lee Schermerhorn
2008-06-19 0:22 ` KAMEZAWA Hiroyuki
2008-06-19 14:45 ` Lee Schermerhorn
2008-06-20 0:47 ` KAMEZAWA Hiroyuki
2008-06-20 1:13 ` KAMEZAWA Hiroyuki
2008-06-20 17:10 ` Lee Schermerhorn
2008-06-20 20:41 ` Lee Schermerhorn
2008-06-21 8:56 ` KOSAKI Motohiro
2008-06-23 0:30 ` KAMEZAWA Hiroyuki
2008-06-21 8:41 ` KOSAKI Motohiro
2008-06-21 8:39 ` KOSAKI Motohiro
2008-06-19 15:32 ` kamezawa.hiroyu
2008-06-20 16:24 ` Lee Schermerhorn
2008-06-17 15:33 ` [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3 KOSAKI Motohiro
2008-06-18 1:54 ` Daisuke Nishimura
2008-06-18 4:41 ` Daisuke Nishimura
2008-06-18 4:59 ` KAMEZAWA Hiroyuki
2008-06-18 7:54 ` [PATCH][-mm] remove redundant page->mapping check KOSAKI Motohiro
2008-06-17 17:46 ` [PATCH][RFC] fix kernel BUG at mm/migrate.c:719! in 2.6.26-rc5-mm3 Lee Schermerhorn
2008-06-17 18:33 ` Hugh Dickins
2008-06-17 19:28 ` Lee Schermerhorn
2008-06-18 5:19 ` Nick Piggin
2008-06-18 2:59 ` Daisuke Nishimura
2008-06-18 1:13 ` KAMEZAWA Hiroyuki
2008-06-18 1:26 ` Daisuke Nishimura
2008-06-18 1:54 ` [PATCH] migration_entry_wait fix KAMEZAWA Hiroyuki
2008-06-18 5:26 ` KOSAKI Motohiro
2008-06-18 5:35 ` Nick Piggin
2008-06-18 6:04 ` KAMEZAWA Hiroyuki
2008-06-18 6:42 ` Nick Piggin
2008-06-18 6:52 ` KAMEZAWA Hiroyuki
2008-06-18 7:29 ` [PATCH -mm][BUGFIX] migration_entry_wait fix. v2 KAMEZAWA Hiroyuki
2008-06-18 7:26 ` KOSAKI Motohiro
2008-06-18 7:40 ` Nick Piggin
2008-06-19 6:59 ` [BUG][PATCH -mm] avoid BUG() in __stop_machine_run() Hidehiro Kawai
2008-06-19 10:12 ` Rusty Russell
2008-06-19 15:51 ` Jeremy Fitzhardinge
2008-06-20 13:21 ` Ingo Molnar
2008-06-23 3:55 ` Rusty Russell
2008-06-23 21:01 ` Ingo Molnar
2008-06-19 16:27 ` 2.6.26-rc5-mm3: BUG large value for HugePages_Rsvd Jon Tollefson
2008-06-19 17:16 ` Andy Whitcroft
2008-06-20 3:18 ` Jon Tollefson [this message]
2008-06-20 19:17 ` [RFC] hugetlb reservations -- MAP_PRIVATE fixes for split vmas Andy Whitcroft
2008-06-20 19:17 ` [PATCH 1/2] hugetlb reservations: move region tracking earlier Andy Whitcroft
2008-06-20 19:17 ` [PATCH 2/2] hugetlb reservations: fix hugetlb MAP_PRIVATE reservations across vma splits Andy Whitcroft
2008-06-23 7:33 ` Mel Gorman
2008-06-23 8:00 ` Mel Gorman
2008-06-23 9:53 ` Andy Whitcroft
2008-06-23 16:04 ` [RFC] hugetlb reservations -- MAP_PRIVATE fixes for split vmas Jon Tollefson
2008-06-23 17:35 ` [RFC] hugetlb reservations -- MAP_PRIVATE fixes for split vmas V2 Andy Whitcroft
2008-06-23 17:35 ` [PATCH 1/2] hugetlb reservations: move region tracking earlier Andy Whitcroft
2008-06-23 23:05 ` Mel Gorman
2008-06-23 17:35 ` [PATCH 2/2] hugetlb reservations: fix hugetlb MAP_PRIVATE reservations across vma splits V2 Andy Whitcroft
2008-06-23 23:08 ` Mel Gorman
2008-06-25 21:22 ` [RFC] hugetlb reservations -- MAP_PRIVATE fixes for split vmas V2 Jon Tollefson
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