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From: Kairui Song <kasong@redhat.com>
To: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Junichi Nomura <j-nomura@ce.jp.nec.com>,
	Chao Fan <fanc.fnst@cn.fujitsu.com>,
	"the arch/x86 maintainers" <x86@kernel.org>,
	kexec@lists.infradead.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v6 1/2] x86/kexec: Build identity mapping for EFI systab and ACPI tables
Date: Tue, 14 May 2019 19:18:33 +0800	[thread overview]
Message-ID: <CACPcB9fSYdOKU0wuMq7H00n2qjhDOmGdyFpz41-1dt9yyRUenA@mail.gmail.com> (raw)
In-Reply-To: <20190514084841.GA27876@dhcp-128-65.nay.redhat.com>

On Tue, May 14, 2019 at 4:48 PM Dave Young <dyoung@redhat.com> wrote:
>
> On 05/14/19 at 11:22am, Dave Young wrote:
> > On 05/13/19 at 04:06pm, Baoquan He wrote:
> > > Hi Dave,
> > >
> > > On 05/13/19 at 09:50am, Borislav Petkov wrote:
> > > > On Mon, May 13, 2019 at 03:32:54PM +0800, Baoquan He wrote:
> > > > > This is a critical bug which breaks memory hotplug,
> > > >
> > > > Please concentrate and stop the blabla:
> > > >
> > > > 36f0c423552d ("x86/boot: Disable RSDP parsing temporarily")
> > > >
> > > > already explains what the deal is. This code was *purposefully* disabled
> > > > because we ran out of time and it broke a couple of machines. Don't make
> > >
> > > I remember your machine is the one on whihc the issue is reported. Could
> > > you also test it and confirm if these all things found ealier are
> > > cleared out?
> > >
> >
> > I did some tests on the laptop,  thing is:
> > 1. apply the 3 patches (two you posted + Boris's revert commit 52b922c3d49c)
> >    on latest Linus master branch, everything works fine.
> >
> > 2. build and test the tip/next-merge-window branch, kernel hangs early
> > without output, (both 1st boot and kexec boot)
>
> Update about 2.  It should be not early rsdp related, I got the boot log
> Since can not reproduce with Linus master branch it may have been fixed.
>
> [    0.685374][    T1] rcu: Hierarchical SRCU implementation.
> [    0.686414][    T1] general protection fault: 0000 [#1] SMP PTI
> [    0.687328][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.1.0-rc6+ #877
> [    0.687328][    T1] Hardware name: LENOVO 4236NUC/4236NUC, BIOS 83ET82WW (1.52 ) 06/04/2018
> [    0.687328][    T1] RIP: 0010:reserve_ds_buffers+0x34e/0x450
> [    0.687328][    T1] Code: e8 77 49 1a 00 4c 8b 54 24 18 48 85 c0 4c 8b 4c 24 10 48 89 44 24 20 0f 84 68 fe ff ff 4a 8b 0c cd 20 88 07 a7 48 8d 54 24 20 <48> 89 04 11 e9 e5 fd ff ff 85 db 0f 85 67 fe ff ff 45 85 ed 75 24
> [    0.687328][    T1] RSP: 0000:ffffa52100c8bd90 EFLAGS: 00010286
> [    0.687328][    T1] RAX: ffff8c6bd5d03000 RBX: 0000000000000000 RCX: ffff8c6bd6000000
> [    0.687328][    T1] RDX: ffffa52100c8bdb0 RSI: ffffffffa620e209 RDI: ffff8c6bd5d04000
> [    0.687328][    T1] RBP: ffff8c6bd60103a0 R08: ffff8c6bd4da0000 R09: 0000000000000000
> [    0.687328][    T1] R10: ffff8c6bd4e20000 R11: ffffc8e248538800 R12: 00000000000103a0
> [    0.687328][    T1] R13: 0000000000010000 R14: fffffe0000013000 R15: 0000000000000000
> [    0.687328][    T1] FS:  0000000000000000(0000) GS:ffff8c6bd6000000(0000) knlGS:0000000000000000
> [    0.687328][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    0.687328][    T1] CR2: ffff8c6bde5ff000 CR3: 000000015700e001 CR4: 00000000000606f0
> [    0.687328][    T1] Call Trace:
> [    0.687328][    T1]  ? hardlockup_detector_event_create+0x50/0x50
> [    0.687328][    T1]  x86_reserve_hardware+0x173/0x180
> [    0.687328][    T1]  x86_pmu_event_init+0x39/0x220
> [    0.687328][    T1]  ? hardlockup_detector_event_create+0x50/0x50
> [    0.687328][    T1]  perf_try_init_event+0x42/0xd0
> [    0.687328][    T1]  perf_event_alloc+0x46a/0x8b0
> [    0.687328][    T1]  perf_event_create_kernel_counter+0x21/0x130
> [    0.687328][    T1]  hardlockup_detector_event_create+0x39/0x50
> [    0.687328][    T1]  hardlockup_detector_perf_init+0xc/0x40
> [    0.687328][    T1]  lockup_detector_init+0x3a/0x71
> [    0.687328][    T1]  kernel_init_freeable+0xbc/0x231
> [    0.687328][    T1]  ? rest_init+0x9f/0x9f
> [    0.687328][    T1]  kernel_init+0xa/0x101
> [    0.687328][    T1]  ret_from_fork+0x35/0x40
> [    0.687328][    T1] Modules linked in:
> [    0.687331][    T1] ---[ end trace 71ee47f6125e74a4 ]---
> [    0.688331][    T1] RIP: 0010:reserve_ds_buffers+0x34e/0x450
> [    0.689330][    T1] Code: e8 77 49 1a 00 4c 8b 54 24 18 48 85 c0 4c 8b 4c 24 10 48 89 44 24 20 0f 84 68 fe ff ff 4a 8b 0c cd 20 88 07 a7 48 8d 54 24 20 <48> 89 04 11 e9 e5 fd ff ff 85 db 0f 85 67 fe ff ff 45 85 ed 75 24
> [    0.690330][    T1] RSP: 0000:ffffa52100c8bd90 EFLAGS: 00010286
> [    0.691330][    T1] RAX: ffff8c6bd5d03000 RBX: 0000000000000000 RCX: ffff8c6bd6000000
> [    0.692330][    T1] RDX: ffffa52100c8bdb0 RSI: ffffffffa620e209 RDI: ffff8c6bd5d04000
> [    0.693330][    T1] RBP: ffff8c6bd60103a0 R08: ffff8c6bd4da0000 R09: 0000000000000000
> [    0.694330][    T1] R10: ffff8c6bd4e20000 R11: ffffc8e248538800 R12: 00000000000103a0
> [    0.695330][    T1] R13: 0000000000010000 R14: fffffe0000013000 R15: 0000000000000000
> [    0.696330][    T1] FS:  0000000000000000(0000) GS:ffff8c6bd6000000(0000) knlGS:0000000000000000
> [    0.697330][    T1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [    0.698330][    T1] CR2: ffff8c6bde5ff000 CR3: 000000015700e001 CR4: 00000000000606f0
> [    0.699334][    T1] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> [    0.700328][    T1] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---
>
> Thanks
> Dave

I can confirm as I got same result on my T420. next-merge-window
branch fails both normal boot and kexec...
I didn't manage to get a working serial console, but the behavior is
the same so should be the same issue.

Also after "git cherry-pick de01951c8d40^..next-merge-window" on
master branch, it worked well, so the patch should be good.

--
Best Regards,
Kairui Song

  reply	other threads:[~2019-05-14 11:18 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-24  9:29 [PATCH v5 0/2] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernel Baoquan He
2019-04-24  9:29 ` [PATCH v5 1/2] x86/kexec: Build identity mapping for EFI systab and ACPI tables Baoquan He
2019-04-27 16:11   ` Borislav Petkov
2019-04-28  5:41     ` Baoquan He
2019-04-29 12:50       ` Borislav Petkov
2019-04-29  0:23   ` [PATCH v6 " Baoquan He
2019-04-29 13:55     ` Borislav Petkov
2019-04-29 14:16       ` Baoquan He
2019-05-13  1:43       ` Baoquan He
2019-05-13  7:07         ` Borislav Petkov
2019-05-13  7:32           ` Baoquan He
2019-05-13  7:50             ` Borislav Petkov
2019-05-13  8:02               ` Baoquan He
2019-05-15  5:17                 ` Junichi Nomura
2019-05-15  6:58                   ` Borislav Petkov
2019-05-15  7:09                     ` Junichi Nomura
2019-05-21  9:02                       ` Kairui Song
2019-05-21 10:43                         ` Junichi Nomura
2019-05-21 18:09                         ` Borislav Petkov
2019-05-28  2:49                           ` Kairui Song
2019-06-06 19:20                             ` Borislav Petkov
2019-05-13  8:06               ` Baoquan He
2019-05-14  3:22                 ` Dave Young
2019-05-14  3:33                   ` Baoquan He
2019-05-21 21:53                     ` Dirk van der Merwe
2019-05-21 23:04                       ` Borislav Petkov
2019-05-14  8:48                   ` Dave Young
2019-05-14 11:18                     ` Kairui Song [this message]
2019-05-14 11:38                     ` Peter Zijlstra
2019-05-14 12:58                       ` Dave Young
2019-05-14 13:54                         ` Peter Zijlstra
2019-05-14 14:09                         ` Ingo Molnar
2019-05-15  1:08                           ` Dave Young
2019-05-15  6:43                             ` Junichi Nomura
2019-05-17 13:41                   ` Borislav Petkov
2019-05-17 13:50                     ` [PATCH] x86/boot: Call get_rsdp_addr() after console_init() Borislav Petkov
2019-05-21  9:28                       ` Baoquan He
2019-06-06 19:22     ` [tip:x86/boot] x86/kexec: Add the EFI system tables and ACPI tables to the ident map tip-bot for Kairui Song
2019-04-24  9:29 ` [PATCH v5 2/2] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernels Baoquan He
2019-04-24  9:33   ` Baoquan He
2019-04-24  9:38 ` [PATCH v5 0/2] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernel Borislav Petkov
2019-04-24 10:00   ` Baoquan He

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