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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Message-ID: <FA47D36D6EC9FE4CB463299737C09B9901D07E7B@shsmsx102.ccr.corp.intel.com>
Date:	Mon, 9 Mar 2015 00:31:22 +0000
From:	"Wang, Xiaoming" <xiaoming.wang@...el.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.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.



> -----Original Message-----
> From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@...cle.com]
> Sent: Friday, March 6, 2015 11:20 PM
> To: Wang, Xiaoming
> Cc: Jan Beulich; Liu@...rp2030.oracle.com; Zhang@...rp2030.oracle.com;
> chris@...is-wilson.co.uk; david.vrabel@...rix.com; lauraa@...eaurora.org;
> heiko.carstens@...ibm.com; linux@...izon.com; Liu, Chuansheng; Zhang,
> Dongxing; takahiro.akashi@...aro.org; akpm@...ux-foundation.org; linux-
> mips@...ux-mips.org; ralf@...ux-mips.org; xen-devel@...ts.xenproject.org;
> boris.ostrovsky@...cle.com; d.kasatkin@...sung.com; pebolle@...cali.nl;
> linux-kernel@...r.kernel.org; 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!
> 
OK, I will try to make a patch to deal with the 'force'  in any order.
> 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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