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From: Linn Crosetto <linn@hp.com>
To: WANG Chao <chaowang@redhat.com>
Cc: kexec@lists.infradead.org, horms@verge.net.au,
	ebiederm@xmission.com, hpa@zytor.com, dyoung@redhat.com,
	trenn@suse.de, vgoyal@redhat.com
Subject: Re: [PATCH v6 0/9] kexec-tools, x86: E820 memmap pass for kdump
Date: Fri, 18 Apr 2014 13:57:06 -0600	[thread overview]
Message-ID: <20140418195706.GA32105@oranje.fc.hp.com> (raw)
In-Reply-To: <20140417062420.GB1849@dhcp-17-89.nay.redhat.com>

On Thu, Apr 17, 2014 at 02:24:20PM +0800, WANG Chao wrote:
> On 04/14/14 at 10:55pm, WANG Chao wrote:
> > Hi, All
> > 
> > This patchset enables passing memory map via E820 map on x86 platform instead
> > of memmap=exactmap. It's a better design and will solve the following problem
> > so far:
> > 
> > - kernel cmdline is limited resource and large machines tend to have many
> >     memory ranges that may excceed kernel cmdline limit size.
> > - kASLR doesn't work with memmap=exactmap, because kASLR happens early than
> >     user defined memmap=exactmap takes effect.
> > 
> > Unfortunately, saved_max_pfn still got its user out there (calgry pci, it looks
> > like the only one). So for backward compatibility, I'm introducing a new option
> > --pass-memmap-cmdline to force kexec-tools to pass memmap=exactmap, the old way.
> > 
> > This patchset contains massive updates from the previous one. I take some
> > suggestions from reviewers. I try to split the changes into smaller pieces and
> > keep the whole change as minimal as I can so it wouldn't be too harsh to review
> > the patch.
> > 
> > Any comment is appreciate!
> 
> Hi, Linn
> 
> Thanks for testing the patch in the past. Do you have chance to test
> this update? 
> 
> This updated patchset changed too much and I want things to work as it's
> used to be on your prototype machine with large number of memory ranges.
> 
> Thanks in advance!
> WANG Chao

Tested the series on a system with 200+ entries in the map; both kexec and kdump
(with and without --pass-memmap-cmdline). Thanks for the patches.

Tested-by: Linn Crosetto <linn@hp.com>


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  parent reply	other threads:[~2014-04-18 19:57 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-14 14:55 [PATCH v6 0/9] kexec-tools, x86: E820 memmap pass for kdump WANG Chao
2014-04-14 14:55 ` [PATCH v6 1/9] x86, cleanup: add extra arguments to add_memmap() and delete_memmap() WANG Chao
2014-04-14 14:55 ` [PATCH v6 2/9] x86, cleanup: add_memmap() only do alignment check on RANGE_RAM WANG Chao
2014-04-14 14:55 ` [PATCH v6 3/9] x86, cleanup: add other types of memory range for 2nd kernel boot to memmap_p WANG Chao
2014-04-14 14:55 ` [PATCH v6 4/9] x86, cleanup: use dbgprint_mem_range for memory range debugging WANG Chao
2014-04-14 14:55 ` [PATCH v6 5/9] x86, cleanup: increase CRASH_MAX_MEMMAP_NR up to CRASH_MAX_MEMORY_RANGES WANG Chao
2014-04-14 14:55 ` [PATCH v6 6/9] x86, cleanup: Store crash memory ranges kexec_info WANG Chao
2014-04-14 14:55 ` [PATCH v6 7/9] x86, cleanup: kexec memory range .end to be inclusive WANG Chao
2014-04-14 14:55 ` [PATCH v6 8/9] x86: add --pass-memmap-cmdline option WANG Chao
2014-04-14 14:55 ` [PATCH v6 9/9] x86: Pass memory range via E820 for kdump WANG Chao
2014-04-17  5:29   ` Dave Young
2014-04-17  5:35     ` Dave Young
2014-04-17  6:17       ` WANG Chao
2014-04-17  6:32         ` Dave Young
2014-04-17  6:44           ` Dave Young
2014-04-17  6:52             ` Dave Young
2014-04-17  7:05             ` WANG Chao
2014-04-17  6:57           ` WANG Chao
2014-04-17  7:07             ` Dave Young
2014-04-17  7:17               ` WANG Chao
2014-04-17  7:30                 ` Dave Young
2014-04-17  8:42                   ` WANG Chao
2014-04-17  9:45                     ` Dave Young
2014-04-17 10:38                       ` WANG Chao
2014-04-17  5:48     ` WANG Chao
2014-04-17  5:58       ` Dave Young
2014-04-21  0:01         ` Simon Horman
2014-04-21  2:49           ` WANG Chao
2014-04-21 15:16             ` Dave Young
2014-04-17  5:38 ` [PATCH v6 0/9] kexec-tools, x86: E820 memmap pass " Dave Young
2014-04-17  6:24 ` WANG Chao
2014-04-17 21:38   ` Linn Crosetto
2014-04-18 19:57   ` Linn Crosetto [this message]
2014-04-17  7:32 ` Dave Young

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