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Message-ID: <c8613886-7014-cbd2-788f-a4f29bb5b4a5@ce.jp.nec.com> Date: Thu, 4 Apr 2019 01:23:26 +0000 From: Junichi Nomura <j-nomura@...jp.nec.com> To: Chao Fan <fanc.fnst@...fujitsu.com>, Dave Young <dyoung@...hat.com> CC: Borislav Petkov <bp@...en8.de>, "bhe@...hat.com" <bhe@...hat.com>, "kasong@...hat.com" <kasong@...hat.com>, "x86@...nel.org" <x86@...nel.org>, "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v2] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernel Hi Dave and Chao, On 4/3/19 6:02 PM, Chao Fan wrote: > On Wed, Apr 03, 2019 at 04:23:06PM +0800, Chao Fan wrote: >> On Wed, Apr 03, 2019 at 04:09:16PM +0800, Dave Young wrote: >>> Fix 3. need more debugging, have you or Junichi run tests on more real >>> hardware, maybe it is easier to reproduce on real hardware, I'm glad to >>> help to try test patch or provide any help. >> >> I am still testing in real hardware. > > Hi Dave, > > I find a Fujitsu Desktop PC to test it. > Without this PATCH, it failed to kexec and kdump. > With this PATCH, it succeed to kexec. > But failed to kdump. From the log, I think it didn't jump to the second > kernel, just reboot after panic. I have not figured out what's the > problem, but it seems not caused by this PATCH. > So I still think this PATCH works for the Fujitsu Desktop PC. > > As for your issue, I think there may be some problems related to specified > hardware. Are you using a Lenovo laptop? > > And I am not sure how Nomura tested it. I've tested 3 different models of EFI-booted baremetal servers with both normal kexec and panic kexec. So far as I've tried Linus's v5.1-rc3, the problem always reproduced without the patch and disappears with the patch. -- Jun'ichi Nomura, NEC Corporation / NEC Solution Innovators, Ltd.
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