From: "Chris Friesen" <cfriesen@nortel.com>
To: Rik van Riel <riel@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: Re: tracking memory usage/leak in "inactive" field in /proc/meminfo? -- solved
Date: Thu, 18 Feb 2010 09:39:33 -0600 [thread overview]
Message-ID: <4B7D5F35.7060700@nortel.com> (raw)
In-Reply-To: <4B7B1AA9.9040609@redhat.com>
On 02/16/2010 04:22 PM, Rik van Riel wrote:
> On 02/16/2010 04:26 PM, Chris Friesen wrote:
>
>> For the backtrace scenario I posted it seems like it might actually be
>> release_pages(). There seems to be a plausible call chain:
>>
>> __ClearPageLRU
>> release_pages
>> free_pages_and_swap_cache
>> tlb_flush_mmu
>> tlb_remove_page
>> zap_pte_range
>>
>> Does that seem right? In this case, tlb_remove_page() is called right
>> after page_remove_rmap() which ultimately results in clearing the
>> PageAnon bit.
>
> That is right - and pinpoints the fault for the memory leak
> on some third party code that fails to release a refcount on
> memory pages.
I think I've tracked down the source of the problem. Turns out one of
our vendors had misapplied a patch which ended up bumping the page count
an extra time.
Thanks to everyone that helped out.
Chris
WARNING: multiple messages have this Message-ID (diff)
From: "Chris Friesen" <cfriesen@nortel.com>
To: Rik van Riel <riel@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: Re: tracking memory usage/leak in "inactive" field in /proc/meminfo? -- solved
Date: Thu, 18 Feb 2010 09:39:33 -0600 [thread overview]
Message-ID: <4B7D5F35.7060700@nortel.com> (raw)
In-Reply-To: <4B7B1AA9.9040609@redhat.com>
On 02/16/2010 04:22 PM, Rik van Riel wrote:
> On 02/16/2010 04:26 PM, Chris Friesen wrote:
>
>> For the backtrace scenario I posted it seems like it might actually be
>> release_pages(). There seems to be a plausible call chain:
>>
>> __ClearPageLRU
>> release_pages
>> free_pages_and_swap_cache
>> tlb_flush_mmu
>> tlb_remove_page
>> zap_pte_range
>>
>> Does that seem right? In this case, tlb_remove_page() is called right
>> after page_remove_rmap() which ultimately results in clearing the
>> PageAnon bit.
>
> That is right - and pinpoints the fault for the memory leak
> on some third party code that fails to release a refcount on
> memory pages.
I think I've tracked down the source of the problem. Turns out one of
our vendors had misapplied a patch which ended up bumping the page count
an extra time.
Thanks to everyone that helped out.
Chris
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next prev parent reply other threads:[~2010-02-18 15:46 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-09 16:51 tracking memory usage/leak in "inactive" field in /proc/meminfo? Chris Friesen
2010-02-09 16:51 ` Chris Friesen
2010-02-10 0:32 ` KOSAKI Motohiro
2010-02-10 0:32 ` KOSAKI Motohiro
2010-02-10 3:50 ` Balbir Singh
2010-02-10 3:50 ` Balbir Singh
2010-02-10 4:09 ` KOSAKI Motohiro
2010-02-10 4:09 ` KOSAKI Motohiro
2010-02-10 17:05 ` Chris Friesen
2010-02-11 0:45 ` Minchan Kim
2010-02-11 0:45 ` Minchan Kim
2010-02-11 18:54 ` Chris Friesen
2010-02-11 18:54 ` Chris Friesen
2010-02-11 19:04 ` Rik van Riel
2010-02-11 19:04 ` Rik van Riel
2010-02-12 2:38 ` Minchan Kim
2010-02-12 2:38 ` Minchan Kim
2010-02-12 7:35 ` Chris Friesen
2010-02-12 7:35 ` Chris Friesen
2010-02-12 8:04 ` KOSAKI Motohiro
2010-02-12 8:04 ` KOSAKI Motohiro
2010-02-15 15:50 ` Chris Friesen
2010-02-15 15:50 ` Chris Friesen
2010-02-15 17:00 ` Rik van Riel
2010-02-15 17:00 ` Rik van Riel
2010-02-16 16:52 ` Chris Friesen
2010-02-16 16:52 ` Chris Friesen
2010-02-16 17:12 ` Rik van Riel
2010-02-16 17:12 ` Rik van Riel
2010-02-16 21:26 ` Chris Friesen
2010-02-16 21:26 ` Chris Friesen
2010-02-16 22:22 ` Rik van Riel
2010-02-16 22:22 ` Rik van Riel
2010-02-18 15:39 ` Chris Friesen [this message]
2010-02-18 15:39 ` tracking memory usage/leak in "inactive" field in /proc/meminfo? -- solved Chris Friesen
2010-02-12 17:50 ` tracking memory usage/leak in "inactive" field in /proc/meminfo? Catalin Marinas
2010-02-12 17:50 ` Catalin Marinas
2010-02-13 6:29 ` Balbir Singh
2010-02-13 6:29 ` Balbir Singh
2010-02-15 16:02 ` Chris Friesen
2010-02-15 16:02 ` Chris Friesen
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