linux-kernel - Re: [PATCH v5] modify the IO_TLB_SEGSIZE and IO_TLB_DEFAULT_SIZE configurable as flexible requirement about SW-IOMMU.

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Date:	Fri, 6 Mar 2015 10:19:31 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	"Wang, Xiaoming" <xiaoming.wang@...el.com>
Cc:	Jan Beulich <JBeulich@...e.com>,
	"Liu@...rp2030.oracle.com" <Liu@...rp2030.oracle.com>,
	"Zhang@...rp2030.oracle.com" <Zhang@...rp2030.oracle.com>,
	"chris@...is-wilson.co.uk" <chris@...is-wilson.co.uk>,
	"david.vrabel@...rix.com" <david.vrabel@...rix.com>,
	"lauraa@...eaurora.org" <lauraa@...eaurora.org>,
	"heiko.carstens@...ibm.com" <heiko.carstens@...ibm.com>,
	"linux@...izon.com" <linux@...izon.com>,
	"Liu, Chuansheng" <chuansheng.liu@...el.com>,
	"Zhang, Dongxing" <dongxing.zhang@...el.com>,
	"takahiro.akashi@...aro.org" <takahiro.akashi@...aro.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
	"ralf@...ux-mips.org" <ralf@...ux-mips.org>,
	"xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
	"boris.ostrovsky@...cle.com" <boris.ostrovsky@...cle.com>,
	"d.kasatkin@...sung.com" <d.kasatkin@...sung.com>,
	"pebolle@...cali.nl" <pebolle@...cali.nl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"jkosina@...e.cz" <jkosina@...e.cz>
Subject: Re: [PATCH v5] modify the IO_TLB_SEGSIZE and IO_TLB_DEFAULT_SIZE
 configurable as flexible requirement about SW-IOMMU.

. snip..

> Format: { <int>,force,<int>,<int>} is suitable I think.
> And fixing  "force" is follow the code design previously in setup_io_tlb_npages.

It is a bug. It should have been smart enough to deal with the 'force' being
in any order.

If you are willing to make a patch to fix this - either folded into this
patch I am responding to or as a seperate one - that would be most excellent!

However, I can also do it - but my plate is full so it will take me some time
to get to it.
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