From: Nick Piggin <nickpiggin@yahoo.com.au>
To: "Alok kataria" <alokkataria1@gmail.com>
Cc: "Andi Kleen" <ak@suse.de>,
hugh@veritas.com, linux-kernel@vger.kernel.org
Subject: Re: ARCH_FREE_PTE_NR 5350 on x86_64
Date: Mon, 15 Oct 2007 22:36:24 +1000 [thread overview]
Message-ID: <200710152236.24789.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <35f686220710142354k66e1b9acwf65864b138ffd26@mail.gmail.com>
On Monday 15 October 2007 16:54, Alok kataria wrote:
> Hi,
>
> Looking at the tlb_flush code path and its co-relation with
> ARCH_FREE_PTE_NR, on x86-64 architecture. I think we still don't use
> the ARCH_FREE_PTE_NR of 5350 as the caching value for the mmu_gathers
> structure, instead fallback to using 506 due to some typo errors in
> the code.
>
> Found this link in the archives.
>
> http://www.ussg.iu.edu/hypermail/linux/kernel/0509.1/1821.html
>
> I don't think anything has been done on this yet (looked at 2.6.23).
> Do let me know if its only a typo that needs a fix, or we are still
> waiting for some other other changes to come into effect.
ARCH_FREE_PTE_NR should probably just get ripped out completely at
this point. Something similar (but working) could be added back if
anybody actually had a workload where it helps to increase the mmu
batch size.
next prev parent reply other threads:[~2007-10-15 7:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-15 6:54 Alok kataria
2007-10-15 12:36 ` Nick Piggin [this message]
2007-10-22 18:22 ` Hugh Dickins
2007-10-22 20:29 ` Benjamin Herrenschmidt
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