From: Louis Bouchard <louis.bouchard@canonical.com>
To: Pratyush Anand <panand@redhat.com>, ats-kumagai@wm.jp.nec.com
Cc: kexec@lists.infradead.org, dyoung@redhat.com, bhe@redhat.com
Subject: Re: [PATCH Makedumpfile 0/4] x86_64: Fix page_offset for randomized base enabled
Date: Tue, 25 Oct 2016 11:17:00 +0200 [thread overview]
Message-ID: <0a183cab-17a4-614c-122e-462a4fc08bd5@canonical.com> (raw)
In-Reply-To: <cover.1477327674.git.panand@redhat.com>
Hello,
Le 24/10/2016 à 18:48, Pratyush Anand a écrit :
> Patch 1/4 fixes page_offset calculation, so that it is correctly calculated
> on KASLR enabled kernel as well.
> Patch 2/4 simplifies VA to PA translation. New code has been benchmarked
> against old code on a 4T system.
> Patch 3/4 and 4/4 is removal of (now) unnecessary code.
>
> I think, we should find a way to kill find_vememmap() as well, so that
> VMEMMAP_START can be removed. I have very limited idea about x86, so unable
> to do that as of now.
>
> Pratyush Anand (4):
> x86_64: Calculate page_offset from pt_load
> x86_64: translate all VA to PA using page table values
> x86_64: kill is_vmalloc_addr_x86_64()
> x86_64: kill some unused initialization
>
> arch/x86_64.c | 84 ++++++++++++++++++++--------------------------------------
> makedumpfile.h | 9 +++----
> 2 files changed, 32 insertions(+), 61 deletions(-)
>
Cross-posting but FYI, this patch fixes the issue reported in the following
thread : makedumpfile issues many readpage_elf: Attempt to read non-existent page[1]
It corresponds to the commit identified by my kernel bisection.
I will wait until it is accepted in Kumagai-san's tree to include it in
Debian/Ubuntu.
Kind regards,
...Louis
[1] https://www.mail-archive.com/kexec@lists.infradead.org/msg16434.html
--
Louis Bouchard
Software engineer, Cloud & Sustaining eng.
Canonical Ltd
Ubuntu developer Debian Maintainer
GPG : 429D 7A3B DD05 B6F8 AF63 B9C4 8B3D 867C 823E 7A61
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next prev parent reply other threads:[~2016-10-25 9:17 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-24 16:48 [PATCH Makedumpfile 0/4] x86_64: Fix page_offset for randomized base enabled Pratyush Anand
2016-10-24 16:48 ` [PATCH] temp Pratyush Anand
2016-10-24 16:51 ` Pratyush Anand
2016-10-24 16:48 ` [PATCH Makedumpfile 1/4] x86_64: Calculate page_offset from pt_load Pratyush Anand
2016-10-27 6:03 ` Pratyush Anand
2016-11-02 7:40 ` Atsushi Kumagai
2016-11-02 8:02 ` bhe
2016-11-04 10:35 ` Atsushi Kumagai
2016-10-24 16:48 ` [PATCH Makedumpfile 2/4] x86_64: translate all VA to PA using page table values Pratyush Anand
2016-10-25 9:20 ` Atsushi Kumagai
2016-10-25 15:12 ` Pratyush Anand
2016-10-25 23:28 ` bhe
2016-10-26 6:24 ` Atsushi Kumagai
2016-10-24 16:48 ` [PATCH Makedumpfile 3/4] x86_64: kill is_vmalloc_addr_x86_64() Pratyush Anand
2016-10-24 16:48 ` [PATCH Makedumpfile 4/4] x86_64: kill some unused initialization Pratyush Anand
2016-10-25 9:17 ` Louis Bouchard [this message]
2016-10-25 9:20 ` [PATCH Makedumpfile 0/4] x86_64: Fix page_offset for randomized base enabled Pratyush Anand
2016-10-27 2:37 ` Dave Young
2016-10-27 2:54 ` Dave Young
2016-10-27 6:19 ` Dave Young
[not found] ` <926225735.8567580.1477574985798.JavaMail.zimbra@redhat.com>
2016-10-27 15:25 ` Dave Anderson
2016-10-27 15:41 ` Dave Anderson
2016-10-28 2:04 ` Dave Young
2016-10-27 15:59 ` Pratyush Anand
2016-10-27 3:25 ` Baoquan He
2016-10-27 5:11 ` Pratyush Anand
[not found] <mailman.65015.1477545113.1639.kexec@lists.infradead.org>
2016-10-27 13:25 ` Dave Anderson
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