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From: Juergen Gross <jgross@suse.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Kevin Moraga <kmoragas@riseup.net>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	David Vrabel <david.vrabel@citrix.com>,
	xen-devel@lists.xen.org
Subject: Re: crash on boot with 4.6.1 on fedora 24
Date: Wed, 11 May 2016 11:57:59 +0200	[thread overview]
Message-ID: <57330227.4010308@suse.com> (raw)
In-Reply-To: <5732F83D02000078000EA6A2@suse.com>

On 11/05/16 09:15, Jan Beulich wrote:
>>>> On 11.05.16 at 09:00, <JGross@suse.com> wrote:
>> Having a Xen specific pte flag seems to be much more intrusive than
>> having an early boot page fault handler consisting of just one line
>> being capable to mimic the default handler in just one aspect (see
>> attached patch - only compile tested).
> 
> Well, this simple handler may serve the purpose here, but what's
> the effect of having it in place on actual #PF (resulting e.g. from
> a bug somewhere)? I.e. what diagnostic information will be
> available to the developer in that case, now that the hypervisor
> won't help out anymore?

Good point. As fixup_exception() is returning 0 in this case we can
set the #PF handler to NULL again and retry the failing instruction.
This will then lead to the same hypervisor handled case as today.


Juergen

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  parent reply	other threads:[~2016-05-11  9:57 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-08 22:51 crash on boot with 4.6.1 on fedora 24 Kevin Moraga
2016-05-09  7:23 ` Andrew Cooper
2016-05-09 10:05   ` Jan Beulich
2016-05-09 10:08 ` Jan Beulich
2016-05-09 14:52   ` Kevin Moraga
2016-05-09 15:53     ` Jan Beulich
2016-05-09 16:40       ` Kevin Moraga
2016-05-09 17:15         ` Boris Ostrovsky
2016-05-09 17:22           ` Kevin Moraga
2016-05-09 18:40             ` Boris Ostrovsky
2016-05-10  7:23               ` Jan Beulich
2016-05-10 13:39                 ` Boris Ostrovsky
2016-05-10 13:57                   ` Jan Beulich
2016-05-10 15:19                     ` Juergen Gross
2016-05-10 15:35                       ` Jan Beulich
     [not found]                       ` <57321BFA02000078000EA3C2@suse.com>
2016-05-10 15:43                         ` Juergen Gross
2016-05-10 16:35                           ` Boris Ostrovsky
2016-05-11  5:49                             ` Juergen Gross
2016-05-11  6:35                               ` Jan Beulich
     [not found]                               ` <5732EEBF02000078000EA613@suse.com>
2016-05-11  7:00                                 ` Juergen Gross
2016-05-11  7:15                                   ` Jan Beulich
     [not found]                                   ` <5732F83D02000078000EA6A2@suse.com>
2016-05-11  9:57                                     ` Juergen Gross [this message]
2016-05-11 10:03                                       ` Jan Beulich
     [not found]                                       ` <57331FA002000078000EA831@suse.com>
2016-05-11 10:10                                         ` Juergen Gross
2016-05-11 12:09                                           ` Jan Beulich
2016-05-11 10:16                                   ` David Vrabel
2016-05-11 12:21                                     ` Jan Beulich
2016-05-11 12:48                                       ` David Vrabel
2016-05-11 13:13                                         ` Jan Beulich
2016-05-11 13:15                                         ` Juergen Gross
2016-05-17 15:11                                     ` David Vrabel
2016-05-17 20:58                                       ` Kevin Moraga
2016-05-26 10:24                                       ` David Vrabel
2016-05-26 14:05                                         ` Boris Ostrovsky
2016-05-26 15:24                                           ` David Vrabel
2016-06-01 16:12                                         ` Martin Cerveny
2016-06-01 16:23                                           ` Martin Cerveny
2016-06-01 19:32                                             ` Boris Ostrovsky
2016-06-01 21:01                                               ` Martin Cerveny
2016-06-01 22:37                                                 ` Boris Ostrovsky
2016-06-02  6:04                                                   ` Martin Cerveny
2016-06-02 13:15                                                     ` Martin Cerveny
2016-06-02  9:54                                           ` David Vrabel
2016-05-10 16:11                 ` Kevin Moraga
2016-05-10 20:11                   ` Boris Ostrovsky
2016-05-12  4:52                     ` Kevin Moraga
  -- strict thread matches above, loose matches on Subject: below --
2016-03-28 17:00 Michael Young
2016-03-29 10:07 ` Jan Beulich
2016-03-29 17:50 ` Konrad Rzeszutek Wilk

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