From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
To: Hari Bathini <hbathini@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
Andrew Morton <akpm@linux-foundation.org>,
Mahesh J Salgaonkar <mahesh@linux.ibm.com>,
Sourabh Jain <sourabhjain@linux.ibm.com>,
Vivek Goyal <vgoyal@redhat.com>, Dave Young <dyoung@redhat.com>,
Petr Tesarik <ptesarik@suse.cz>,
linuxppc-dev <linuxppc-dev@ozlabs.org>,
Kexec-ml <kexec@lists.infradead.org>,
lkml <linux-kernel@vger.kernel.org>,
Pingfan Liu <piliu@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
Mimi Zohar <zohar@linux.ibm.com>,
Nayna Jain <nayna@linux.ibm.com>
Subject: Re: [RESEND PATCH v5 06/11] ppc64/kexec_file: restrict memory usage of kdump kernel
Date: Mon, 27 Jul 2020 23:10:08 -0300 [thread overview]
Message-ID: <87ft9cxudb.fsf@morokweng.localdomain> (raw)
In-Reply-To: <159579231812.5790.16096865978767385505.stgit@hbathini>
Hari Bathini <hbathini@linux.ibm.com> writes:
> Kdump kernel, used for capturing the kernel core image, is supposed
> to use only specific memory regions to avoid corrupting the image to
> be captured. The regions are crashkernel range - the memory reserved
> explicitly for kdump kernel, memory used for the tce-table, the OPAL
> region and RTAS region as applicable. Restrict kdump kernel memory
> to use only these regions by setting up usable-memory DT property.
> Also, tell the kdump kernel to run at the loaded address by setting
> the magic word at 0x5c.
>
> Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
> Tested-by: Pingfan Liu <piliu@redhat.com>
I liked the new versions of get_node_path_size() and get_node_path().
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
--
Thiago Jung Bauermann
IBM Linux Technology Center
next prev parent reply other threads:[~2020-07-28 2:10 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-26 19:36 [RESEND PATCH v5 00/11] ppc64: enable kdump support for kexec_file_load syscall Hari Bathini
2020-07-26 19:36 ` [RESEND PATCH v5 01/11] kexec_file: allow archs to handle special regions while locating memory hole Hari Bathini
2020-07-26 19:36 ` [RESEND PATCH v5 02/11] powerpc/kexec_file: mark PPC64 specific code Hari Bathini
2020-07-26 19:37 ` [RESEND PATCH v5 03/11] powerpc/kexec_file: add helper functions for getting memory ranges Hari Bathini
2020-07-28 12:58 ` Michael Ellerman
2020-07-26 19:38 ` [RESEND PATCH v5 04/11] ppc64/kexec_file: avoid stomping memory used by special regions Hari Bathini
2020-07-26 19:38 ` [RESEND PATCH v5 05/11] powerpc/drmem: make lmb walk a bit more flexible Hari Bathini
2020-07-26 19:38 ` [RESEND PATCH v5 06/11] ppc64/kexec_file: restrict memory usage of kdump kernel Hari Bathini
2020-07-28 2:10 ` Thiago Jung Bauermann [this message]
2020-07-28 13:44 ` Michael Ellerman
2020-07-28 19:34 ` Hari Bathini
2020-07-26 19:39 ` [RESEND PATCH v5 07/11] ppc64/kexec_file: enable early kernel's OPAL calls Hari Bathini
2020-07-28 2:17 ` Thiago Jung Bauermann
2020-07-28 13:46 ` Michael Ellerman
2020-07-28 19:24 ` Hari Bathini
2020-07-29 1:15 ` Michael Ellerman
2020-07-26 19:39 ` [RESEND PATCH v5 08/11] ppc64/kexec_file: setup backup region for kdump kernel Hari Bathini
2020-07-28 2:37 ` Thiago Jung Bauermann
2020-07-28 14:11 ` Michael Ellerman
2020-07-26 19:39 ` [RESEND PATCH v5 09/11] ppc64/kexec_file: prepare elfcore header for crashing kernel Hari Bathini
2020-07-26 19:40 ` [RESEND PATCH v5 10/11] ppc64/kexec_file: add appropriate regions for memory reserve map Hari Bathini
2020-07-26 19:40 ` [RESEND PATCH v5 11/11] ppc64/kexec_file: fix kexec load failure with lack of memory hole Hari Bathini
2020-07-28 2:32 ` [RESEND PATCH v5 00/11] ppc64: enable kdump support for kexec_file_load syscall piliu
2020-07-30 6:05 ` Hari Bathini
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