From: Nick Piggin <nickpiggin@yahoo.com.au>
To: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Ken Chen <kenchen@google.com>,
Badari Pulavarty <pbadari@gmail.com>,
linux-mm <linux-mm@kvack.org>,
tony.luck@intel.com
Subject: Re: [rfc] more granular page table lock for hugepages
Date: Mon, 15 Oct 2007 14:17:53 +1000 [thread overview]
Message-ID: <200710151417.53342.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <20071014154223.GD19625@linux-os.sc.intel.com>
On Monday 15 October 2007 01:42, Siddha, Suresh B wrote:
> On Sun, Oct 14, 2007 at 09:27:46AM +1000, Nick Piggin wrote:
> > On Saturday 13 October 2007 06:34, Siddha, Suresh B wrote:
> > > On ia64, we have "tpa" instruction which does the virtual to physical
> > > address conversion for us. But talking to Tony, that will fault during
> > > not present or vhpt misses.
> > >
> > > Well, for now, manual walk is probably the best we have.
> >
> > Hmm, we'd actually want it to fault, and go through the full
> > handle_mm_fault path if possible, and somehow just give an
>
> But, this walk was happening with interrupts disabled. So the best will be
> to have a peek at the page tables without faulting and the peek can
> comeback and say, sorry, you have to go through slowest path.
Oh yeah, you're right of course. I guess it is probably better to
do that way anyway: either way we have to take mmap_sem, and once
taken, it is probably better to hold it and batch up the rest of
the operations in the slowpath.
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prev parent reply other threads:[~2007-10-15 4:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-08 22:52 Siddha, Suresh B
2007-10-09 20:23 ` Ken Chen
2007-10-09 21:05 ` Badari Pulavarty
2007-10-10 0:15 ` Siddha, Suresh B
2007-10-10 6:10 ` Ken Chen
2007-10-10 7:50 ` Ken Chen
2007-10-11 11:39 ` Nick Piggin
2007-10-12 20:34 ` Siddha, Suresh B
2007-10-13 23:27 ` Nick Piggin
2007-10-14 1:01 ` [rfc] lockless get_user_pages for dio (and more) Nick Piggin
2007-10-14 18:19 ` Siddha, Suresh B
2007-10-15 4:15 ` Nick Piggin
2007-10-15 12:25 ` Nick Piggin
2007-10-15 17:03 ` Badari Pulavarty
2007-10-15 17:49 ` Siddha, Suresh B
2007-10-15 17:54 ` Siddha, Suresh B
2007-10-15 20:21 ` Ken Chen
2007-10-16 2:15 ` Nick Piggin
2007-10-16 0:14 ` Dave Hansen
2007-10-16 3:26 ` Nick Piggin
2007-10-16 3:32 ` Nick Piggin
2007-12-10 21:30 ` Dave Kleikamp
2007-12-12 4:57 ` Nick Piggin
2007-12-12 5:11 ` Dave Kleikamp
2007-12-12 5:40 ` Nick Piggin
2008-01-16 19:58 ` Dave Kleikamp
2008-01-17 6:34 ` Nick Piggin
2008-01-24 7:06 ` Nick Piggin
2007-10-14 15:42 ` [rfc] more granular page table lock for hugepages Siddha, Suresh B
2007-10-15 4:17 ` Nick Piggin [this message]
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