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From: James Morse <james.morse@arm.com>
To: Wei Xu <xuwei5@hisilicon.com>
Cc: Will Deacon <will.deacon@arm.com>,
	mark.rutland@arm.com, catalin.marinas@arm.com,
	Linuxarm <linuxarm@huawei.com>,
	Zhangyi ac <zhangyi.ac@huawei.com>,
	suzuki.poulose@arm.com, marc.zyngier@arm.com,
	"Xiongfanggou (James)" <james.xiong@huawei.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, dave.martin@arm.com,
	"Liyuan (Larry, Turing Solution)" <Larry.T@huawei.com>,
	libeijian@hisilicon.com
Subject: Re: KVM guest sometimes failed to boot because of kernel stack overflow if KPTI is enabled on a hisilicon ARM64 platform.
Date: Wed, 27 Jun 2018 09:39:36 +0100	[thread overview]
Message-ID: <942e76b6-a46a-6c5e-5ec3-67daca636d43@arm.com> (raw)
In-Reply-To: <20180626174746.GO23375@arm.com>

Hi Wei,

On 26/06/18 18:47, Will Deacon wrote:
> On Wed, Jun 27, 2018 at 01:16:44AM +0800, Wei Xu wrote:
>>     [    0.000000] Booting Linux on physical CPU 0x0000000000 [0x480fd010]
>>     [    0.000000] Linux version 4.18.0-rc2-58583-g7daf201-dirty
> 
> I'm still suspicious that this is 4.18-rc2 with "no change on top" ^^^ !

Some examples:

For comparison, when I boot v4.17 it looks like this:
| Linux version 4.17.0 (morse@melchizedek) (gcc version 4.9.3 20141031
| (prerelease) (Linaro GCC 2014.11)) #9886 SMP PREEMPT Thu Jun 21 10:30:55 BST
| 2018


If I apply some extra patches and make some uncommitted changes, it looks like this:
| Linux version 4.17.0-00025-ga22ca2234824-dirty (morse@melchizedek) (gcc
| version 4.9.3 20141031 (prerelease) (Linaro GCC 2014.11)) #9887 SMP PREEMPT
| Thu Jun 21 10:46:22 BST 2018


Hence we read your '4.17.0-45864-g29dcea8-dirty' line as v4.17 with extra
patches and uncommited changes, and similar with this v4.18-rc2.

I agree 7daf201 is the head commit for v4.18-rc2, but something has gone wrong
here. Could you try building from a fresh clone of Linus' tree?

(I suspect at some point you've applied a patch, and have then been merging
upstream, instead of 'fast forwarding')



Thanks,

James

  reply	other threads:[~2018-06-27  8:39 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-20 14:18 KVM guest sometimes failed to boot because of kernel stack overflow if KPTI is enabled on a hisilicon ARM64 platform Wei Xu
2018-06-20 14:42 ` Will Deacon
2018-06-20 15:52   ` Wei Xu
2018-06-20 15:54     ` James Morse
2018-06-20 16:25       ` Wei Xu
2018-06-20 16:28         ` Will Deacon
2018-06-20 16:33           ` Wei Xu
2018-06-21  8:38         ` James Morse
2018-06-21  9:00           ` Marc Zyngier
2018-06-21  9:18           ` Will Deacon
2018-06-21 10:14             ` Wei Xu
2018-06-21 10:54               ` Will Deacon
2018-06-22  8:33                 ` Wei Xu
2018-06-22  9:23                   ` Will Deacon
2018-06-22 10:45                     ` Wei Xu
2018-06-22 11:16                       ` Will Deacon
2018-06-22 13:18                         ` Wei Xu
2018-06-22 13:31                           ` Will Deacon
2018-06-22 13:46                             ` Wei Xu
2018-06-22 14:43                               ` Will Deacon
2018-06-22 15:26                                 ` Wei Xu
2018-06-22 14:28                           ` Mark Rutland
2018-06-22 15:28                             ` Wei Xu
2018-06-22 15:41                               ` Will Deacon
2018-06-22 16:02                                 ` Wei Xu
2018-06-21  9:20           ` Wei Xu
2018-06-26 17:16             ` Wei Xu
2018-06-26 17:47               ` Will Deacon
2018-06-27  8:39                 ` James Morse [this message]
2018-06-27 13:26                   ` Wei Xu
2018-06-28  8:45                     ` James Morse
2018-06-28 10:20                       ` Wei Xu
2018-06-27 13:22                 ` Wei Xu
2018-06-27 13:28                   ` Will Deacon
2018-06-27 13:32                     ` Wei Xu
2018-06-28 14:50                     ` Wei Xu
2018-06-28 15:34                       ` Mark Rutland
     [not found]                         ` <etPan.5b3507f7.914aa16.1d6b@localhost>
2018-06-28 16:24                           ` 答复: " Mark Rutland
2018-06-29  9:59                             ` Mark Rutland

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