From: Eric Dumazet <eric.dumazet@gmail.com>
To: Benjamin Poirier <benjamin.poirier@gmail.com>
Cc: "Lluís Batlle i Rossell" <viric@viric.name>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
"Carles Pagès" <page@cubata.homelinux.net>,
linux-arm-kernel@lists.infradead.org
Subject: Re: Regarding tx-nocache-copy in the Sheevaplug
Date: Thu, 16 Oct 2014 10:48:25 -0700 [thread overview]
Message-ID: <1413481705.28798.32.camel@edumazet-glaptop2.roam.corp.google.com> (raw)
In-Reply-To: <20141016173401.GA16515@f1.synalogic.ca>
On Thu, 2014-10-16 at 10:34 -0700, Benjamin Poirier wrote:
> On 2014/10/15 15:45, Eric Dumazet wrote:
> > kmap_atomic()/kunmap_atomic() is missing, so we lack
> > __cpuc_flush_dcache_area() operations.
> >
>
> You lost me there.
> 1) I don't see the link
> 2) It seems kmap_atomic and so on are there:
> $ grep kmap_atomic System.map-3.16-2-kirkwood
> c0014838 T kmap_atomic
> c001491c T kmap_atomic_pfn
> c00149a4 T kmap_atomic_to_page
>
> MACH_KIRKWOOD selects CPU_FEROCEON which has
> __cpuc_flush_dcache_area ->
> cpu_cache.flush_kern_dcache_area ->
> feroceon_flush_kern_dcache_area
I meant to put a '?' instead of a '.'
Note that tcp does a copy, using :
prev parent reply other threads:[~2014-10-16 17:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-13 10:52 Regarding tx-nocache-copy in the Sheevaplug Lluís Batlle i Rossell
2014-10-13 12:26 ` Eric Dumazet
2014-10-13 12:32 ` Lluís Batlle i Rossell
2014-10-13 14:21 ` Andrew Lunn
2014-10-13 14:31 ` Lluís Batlle i Rossell
2014-10-13 14:49 ` Eric Dumazet
2014-10-13 15:48 ` Lluís Batlle i Rossell
2014-10-15 21:57 ` Benjamin Poirier
2014-10-15 22:45 ` Eric Dumazet
2014-10-16 17:34 ` Benjamin Poirier
2014-10-16 17:46 ` Lluís Batlle i Rossell
2014-10-17 20:55 ` Benjamin Poirier
2014-10-16 17:48 ` Eric Dumazet [this message]
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