From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>
Subject: Re: Fix breakage caused by tlb flush batch changes
Date: Wed, 18 Apr 2007 17:39:52 +1000 [thread overview]
Message-ID: <1176881992.7639.2.camel@localhost.localdomain> (raw)
In-Reply-To: <20070418061948.GA29312@localhost.localdomain>
On Wed, 2007-04-18 at 16:19 +1000, David Gibson wrote:
> BenH's commit a741e67969577163a4cfc78d7fd2753219087ef1 in powerpc.git,
> although (AFAICT) only intended to affect ppc64, also has side-effects
> which break 44x. I think 40x, 8xx and Freescale Book E are also
> affected, though I haven't tested them.
>
> The problem lies in unconditionally removing flush_tlb_pending() from
> the versions of flush_tlb_mm(), flush_tlb_range() and
> flush_tlb_kernel_range() used on ppc64 - which are also used the
> embedded platforms mentioned above.
>
> The patch below restores the necessary flushes and fixes the breakage
> for 44x. They should also fix any breakage for the other platforms,
> but again I haven't tested those.
Damn, do these things use a batch at all ? If not, they should defkine
the whole set a functions separately rather than ifdef's like that...
flush_tlb_pending is a bad name for that.
Ben.
next prev parent reply other threads:[~2007-04-18 7:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-18 6:19 Fix breakage caused by tlb flush batch changes David Gibson
2007-04-18 7:39 ` Benjamin Herrenschmidt [this message]
2007-04-18 8:04 ` David Gibson
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