RE: [PATCH 1/2] mm: drop migrate type checks from has_unmovable_pages

[Ran Wang]

Hi Michal,
> -----Original Message-----
> From: Michal Hocko [mailto:mhocko@xxxxxxxxxx]
> Sent: Tuesday, November 14, 2017 3:07 PM
> To: Ran Wang <ran.wang_1@xxxxxxx>
> Cc: linux-mm@xxxxxxxxx; Michael Ellerman <mpe@xxxxxxxxxxxxxx>; Vlastimil
> Babka <vbabka@xxxxxxx>; Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>;
> KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>; Reza Arbab
> <arbab@xxxxxxxxxxxxxxxxxx>; Yasuaki Ishimatsu <yasu.isimatu@xxxxxxxxx>;
> qiuxishi@xxxxxxxxxx; Igor Mammedov <imammedo@xxxxxxxxxx>; Vitaly
> Kuznetsov <vkuznets@xxxxxxxxxx>; LKML <linux-kernel@xxxxxxxxxxxxxxx>;
> Leo Li <leoyang.li@xxxxxxx>; Xiaobo Xie <xiaobo.xie@xxxxxxx>
> Subject: Re: [PATCH 1/2] mm: drop migrate type checks from
> has_unmovable_pages
> 
> On Tue 14-11-17 06:10:00, Ran Wang wrote:
> [...]
> > > > This drop cause DWC3 USB controller fail on initialization with
> > > > Layerscaper processors (such as LS1043A) as below:
> > > >
> > > > [    2.701437] xhci-hcd xhci-hcd.0.auto: new USB bus registered,
> assigned
> > > bus number 1
> > > > [    2.710949] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -16
> > > > [    2.717411] xhci-hcd xhci-hcd.0.auto: can't setup: -12
> > > > [    2.727940] xhci-hcd xhci-hcd.0.auto: USB bus 1 deregistered
> > > > [    2.733607] xhci-hcd: probe of xhci-hcd.0.auto failed with error -12
> > > > [    2.739978] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
> > > >
> > > > And I notice that someone also reported to you that DWC2 got
> > > > affected recently, so do you have the solution now?
> > >
> > > Yes. It should be in linux-next. Have a look at the following email
> > > thread:
> > >
> https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flkml.
> > >
> kernel.org%2Fr%2F20171104082500.qvzbb2kw4suo6cgy%40dhcp22.suse.cz&
> > >
> data=02%7C01%7Cran.wang_1%40nxp.com%7C5e73c6a941fc4f1c10e708d52
> > >
> a860c5b%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C636461677
> > >
> 583607877&sdata=zlRxJ4LZwOBsit5qRx9yFT5qfP54wZ0z6G1z%2Bcywf5g%3D
> > > &reserved=0
> 
> I really have no idea where the above link came from because my email had
> a reference to
> https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flkml.
> kernel.org%2Fr%2F20171104082500.qvzbb2kw4suo6cgy%40dhcp22.suse.cz&
> data=02%7C01%7Cran.wang_1%40nxp.com%7C9b452e62f11e446d12b408d5
> 2b2e4014%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63646239
> 9997608449&sdata=S9MPhGyIUiYCJdVYMh3DAHAEytu%2Fu45BB%2BcMhO%
> 2BP3Qo%3D&reserved=0
> Has your email client modified the original email?
> 
> > Thanks for your info, although I fail to open the link you shared, but
> > I got patch from my colleague and the issue got fix on my side, let you know,
> thanks.
> 
> Thanks for your testing anyway. Can I assume your Tested-by?
Yes, please.

BR
Ran
> --
> Michal Hocko
> SUSE Labs