From: Rick Sherm <rick.sherm@yahoo.com>
To: linux-kernel@vger.kernel.org
Subject: Memory policy question for NUMA arch....
Date: Tue, 6 Apr 2010 12:29:12 -0700 (PDT) [thread overview]
Message-ID: <132589.32312.qm@web114310.mail.gq1.yahoo.com> (raw)
Hello,
On a NUMA host, if a driver calls __get_free_pages() then it will eventually invoke ->alloc_pages_current(..). The comment above/within alloc_pages_current() says 'current->mempolicy' will be used.So what memory policy will kick-in if the driver is trying to allocate some memory blocks during driver load time(say from probe_one)? System-wide default policy,correct?
What if the driver wishes to i) stay confined to a 'cpulist' OR ii) use a different mem-policy? How do I achieve this?
I will choose the 'cpulist' after I am successfuly able to affinitize the MSI-X vectors.
regards
Rick
next reply other threads:[~2010-04-06 19:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-06 19:29 Rick Sherm [this message]
[not found] <524835.89860.qm@web114303.mail.gq1.yahoo.com>
2010-04-07 9:00 ` Memory policy question for NUMA arch Andi Kleen
2010-04-07 15:48 ` Rick Sherm
2010-04-07 17:27 ` Lee Schermerhorn
[not found] <243351.5510.qm@web111910.mail.gq1.yahoo.com>
2010-04-16 23:17 ` Chetan Loke
2010-04-17 6:35 ` Andi Kleen
2010-04-17 14:59 ` Chetan Loke
2010-04-17 19:30 ` Andi Kleen
2010-04-19 15:16 ` Lee Schermerhorn
2010-04-20 20:34 Chetan Loke
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