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From: Kumar Gala <galak@kernel.crashing.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 11/16] powerpc/mm: Add SMP support to no-hash TLB handling v3
Date: Mon, 15 Dec 2008 16:19:47 -0600	[thread overview]
Message-ID: <01FA1F1A-0A98-4553-B27D-CBC627E3EC02@kernel.crashing.org> (raw)
In-Reply-To: <1229375937.26324.128.camel@pasglop>


On Dec 15, 2008, at 3:18 PM, Benjamin Herrenschmidt wrote:

> On Mon, 2008-12-15 at 15:10 -0600, Kumar Gala wrote:
>
>> Hmm.. are you mixing the two different locking needs together?  The  
>> is
>> locking of ivax vs tlbwe and there is locking around multiple "msgs"
>> on the bus.  I know for us we can have any # of ivax's on the bus,  
>> but
>> only one tlbsync.
>
> I'm purely talking about the later. Right now I only issue one ivax +
> one tlbsycn anyway but I was thinking about having _tlbivax_bcast  
> take a
> count for small ranges, but I would still lock the whole thing because
> some impl I know of don't like multiple ivax coliding form different
> sources neither.

Ok.  Lets use MMU_FTR_LOCK_BCAST_TLB_OPS and have a comment about  
locking because bus implementations cant handle multiple ivax and/or  
multiple syncs.

- k

  reply	other threads:[~2008-12-15 22:19 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-15  5:43 [PATCH 0/16] powerpc: Preliminary work to enable SMP BookE (v2) Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 1/16] powerpc: Fix bogus cache flushing on all 40x and BookE processors v2 Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 2/16] powerpc: Fix asm EMIT_BUG_ENTRY with !CONFIG_BUG Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 3/16] powerpc/4xx: Extended DCR support v2 Benjamin Herrenschmidt
2008-12-17 17:33   ` Josh Boyer
2008-12-15  5:44 ` [PATCH 4/16] powerpc/fsl-booke: Fix problem with _tlbil_va Benjamin Herrenschmidt
2008-12-15  6:59   ` Stephen Rothwell
2008-12-15  7:04     ` Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 5/16] powerpc/mm: Add local_flush_tlb_mm() to SW loaded TLB implementations Benjamin Herrenschmidt
2008-12-15 20:30   ` Kumar Gala
2008-12-15  5:44 ` [PATCH 6/16] powerpc/mm: Split mmu_context handling v3 Benjamin Herrenschmidt
2008-12-15 15:43   ` Arnd Bergmann
2008-12-15 20:20     ` Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 7/16] powerpc/mm: Rework context management for CPUs with no hash table v2 Benjamin Herrenschmidt
2008-12-17 21:30   ` Kumar Gala
2008-12-15  5:44 ` [PATCH 8/16] powerpc/mm: Rename tlb_32.c and tlb_64.c to tlb_hash32.c and tlb_hash64.c Benjamin Herrenschmidt
2008-12-15 20:36   ` Kumar Gala
2008-12-15 20:46     ` Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 9/16] powerpc/mm: Introduce MMU features v2 Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 10/16] powerpc/mm: Remove flush_HPTE() Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 11/16] powerpc/mm: Add SMP support to no-hash TLB handling v3 Benjamin Herrenschmidt
2008-12-15 20:19   ` Kumar Gala
2008-12-15 20:46     ` Benjamin Herrenschmidt
2008-12-15 20:57       ` Kumar Gala
2008-12-15 21:03         ` Benjamin Herrenschmidt
2008-12-15 21:10           ` Kumar Gala
2008-12-15 21:18             ` Benjamin Herrenschmidt
2008-12-15 22:19               ` Kumar Gala [this message]
2008-12-15 23:31                 ` Benjamin Herrenschmidt
2008-12-15  5:45 ` [PATCH 12/16] powerpc/mm: Split low level tlb invalidate for nohash processors Benjamin Herrenschmidt
2008-12-15  5:45 ` [PATCH 13/16] powerpc/44x: No need to mask MSR:CE, ME or DE in _tlbil_va on 440 Benjamin Herrenschmidt
2008-12-15 12:25   ` [PATCH 13/16] powerpc/44x: No need to mask MSR:CE,ME " Josh Boyer
2008-12-15  5:45 ` [PATCH 14/16] powerpc/mm: Runtime allocation of mmu context maps for nohash CPUs v2 Benjamin Herrenschmidt
2008-12-17 21:21   ` Kumar Gala
2008-12-15  5:45 ` [PATCH 15/16] powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED Benjamin Herrenschmidt
2008-12-15 20:54   ` Kumar Gala
2008-12-15 21:01     ` Benjamin Herrenschmidt
2008-12-15 21:08       ` Kumar Gala
2008-12-15 21:03     ` Michael Ellerman
2008-12-15 21:05       ` Benjamin Herrenschmidt
2008-12-15  5:45 ` [PATCH 16/16] powerpc/44x: 44x TLB doesn't need "Guarded" set for all pages Benjamin Herrenschmidt

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