From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Fengguang Wu <fengguang.wu@intel.com>,
David Cohen <david.a.cohen@linux.intel.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Damien Ramonda <damien.ramonda@intel.com>,
Jan Kara <jack@suse.cz>,
Linus Torvalds <torvalds@linux-foundation.org>,
Nishanth Aravamudan <nacc@linux.vnet.ibm.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH V5] mm readahead: Fix readahead fail for no local memory and limit readahead pages
Date: Thu, 13 Feb 2014 15:34:22 +0530 [thread overview]
Message-ID: <52FC98A6.1000701@linux.vnet.ibm.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1402130003320.11689@chino.kir.corp.google.com>
On 02/13/2014 01:35 PM, David Rientjes wrote:
> On Thu, 13 Feb 2014, Raghavendra K T wrote:
>
>> I was able to test (1) implementation on the system where readahead problem
>> occurred. Unfortunately it did not help.
>>
>> Reason seem to be that CONFIG_HAVE_MEMORYLESS_NODES dependency of
>> numa_mem_id(). The PPC machine I am facing problem has topology like
>> this:
[...]
>>
>> So it seems numa_mem_id() does not help for all the configs..
>> Am I missing something ?
>>
>
> You need the patch from http://marc.info/?l=linux-mm&m=139093411119013
> first.
Thanks David, unfortunately even after applying that patch, I do not see
the improvement.
Interestingly numa_mem_id() seem to still return the value of a
memoryless node.
May be per cpu _numa_mem_ values are not set properly. Need to dig out ....
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next prev parent reply other threads:[~2014-02-13 9:58 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-22 10:53 [RFC PATCH V5] mm readahead: Fix readahead fail for no local memory and limit readahead pages Raghavendra K T
2014-02-03 8:30 ` Raghavendra K T
2014-02-06 22:51 ` Andrew Morton
2014-02-06 22:58 ` David Rientjes
2014-02-06 23:22 ` Andrew Morton
2014-02-06 23:48 ` David Rientjes
2014-02-06 23:58 ` David Rientjes
2014-02-07 10:42 ` Raghavendra K T
2014-02-07 20:41 ` David Rientjes
2014-02-10 8:21 ` Raghavendra K T
2014-02-10 10:05 ` David Rientjes
2014-02-10 12:25 ` Raghavendra K T
2014-02-10 21:35 ` David Rientjes
2014-02-13 7:07 ` Raghavendra K T
2014-02-13 8:05 ` David Rientjes
2014-02-13 10:04 ` Raghavendra K T [this message]
2014-02-13 22:41 ` David Rientjes
2014-02-14 0:14 ` Nishanth Aravamudan
2014-02-14 0:37 ` Linus Torvalds
2014-02-14 0:45 ` Andrew Morton
2014-02-14 4:32 ` Nishanth Aravamudan
2014-02-14 10:54 ` David Rientjes
2014-02-17 19:28 ` Nishanth Aravamudan
2014-02-17 23:14 ` David Rientjes
2014-02-18 1:31 ` Nishanth Aravamudan
2014-02-17 22:59 ` Linus Torvalds
2014-02-14 7:43 ` Jan Kara
2014-02-17 22:57 ` Linus Torvalds
2014-02-14 5:47 ` Nishanth Aravamudan
2014-02-13 21:06 ` Andrew Morton
2014-02-13 21:42 ` Nishanth Aravamudan
2014-02-10 8:29 ` [RFC PATCH V5 RESEND] " Raghavendra K T
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