linux-kernel - Re: USB mass storage and ARM cache coherency

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Date:	Wed, 3 Mar 2010 20:24:57 +0000
From:	Jamie Lokier <jamie@...reable.org>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Matthew Dharm <mdharm-kernel@...-eyed-alien.net>,
	Oliver Neukum <oliver@...kum.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	"Mankad, Maulik Ojas" <x0082077@...com>,
	Sergei Shtylyov <sshtylyov@...mvista.com>,
	Ming Lei <tom.leiming@...il.com>,
	Sebastian Siewior <bigeasy@...utronix.de>,
	linux-usb@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	"Shilimkar, Santosh" <santosh.shilimkar@...com>,
	Pavel Machek <pavel@....cz>, Greg KH <greg@...ah.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: USB mass storage and ARM cache coherency

Catalin Marinas wrote:
> > I wonder if it's time to get a PG_arch_2 :-)
> 
> As an optimisation, I think this would help (rather than always
> invalidating the I-cache in update_mmu_cache or set_pte_at).

If PG_arch_{1,2} are used in the same way on all architectures, when
they are used at all, perhaps they should be renamed :-)

-- Jamie
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