From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Liu ping fan <kernelfans@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org, Paul Mackerras <paulus@samba.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH 1/3] powerpc: mm: make _PAGE_NUMA take effect
Date: Wed, 11 Dec 2013 20:50:16 +1100 [thread overview]
Message-ID: <1386755416.15730.12.camel@pasglop> (raw)
In-Reply-To: <CAFgQCTtd1v+ANEy899_Tk2UmYsAL1Lxe8t6WuMxFvjXk5rtn_Q@mail.gmail.com>
On Wed, 2013-12-11 at 16:50 +0800, Liu ping fan wrote:
> > why ? , All the hash routines do check for _PAGE_PRESENT via access
> > variable.
> >
> Going through __hash_page_4K(4k on 4k HW), I do not find such check.
> Am I wrong? Or I will send out a patch to fix that.
We pass a bitmask of flags to check which are tested by doing an "andc"
of the PTE on that mask and checking if anything is left...
Ben.
next prev parent reply other threads:[~2013-12-11 9:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-04 6:59 [PATCH 0/3] optimize for powerpc _PAGE_NUMA Liu Ping Fan
2013-12-04 6:59 ` [PATCH 1/3] powerpc: mm: make _PAGE_NUMA take effect Liu Ping Fan
2013-12-05 10:53 ` Aneesh Kumar K.V
2013-12-09 0:31 ` Benjamin Herrenschmidt
2013-12-09 6:17 ` Liu ping fan
2013-12-09 6:19 ` Benjamin Herrenschmidt
2013-12-11 8:50 ` Liu ping fan
2013-12-11 9:50 ` Benjamin Herrenschmidt [this message]
2013-12-12 2:19 ` Liu ping fan
2013-12-04 6:59 ` [PATCH 2/3] mm: export numa_migrate_prep() Liu Ping Fan
2013-12-04 6:59 ` [PATCH 3/3] powerpc: mm: optimize for the correctly placed page Liu Ping Fan
2013-12-05 10:58 ` Aneesh Kumar K.V
2013-12-05 13:27 ` Liu ping fan
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