From: Borislav Petkov <bp@alien8.de>
To: Dave Young <dyoung@redhat.com>
Cc: David Hildenbrand <david@redhat.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, devel@linuxdriverproject.org,
linux-fsdevel@vger.kernel.org, linux-pm@vger.kernel.org,
xen-devel@lists.xenproject.org,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Baoquan He <bhe@redhat.com>, Omar Sandoval <osandov@fb.com>,
Arnd Bergmann <arnd@arndb.de>,
Matthew Wilcox <willy@infradead.org>,
Michal Hocko <mhocko@suse.com>, Lianbo Jiang <lijiang@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH RFC 3/6] kexec: export PG_offline to VMCOREINFO
Date: Thu, 15 Nov 2018 12:10:23 +0100 [thread overview]
Message-ID: <20181115111023.GC26448@zn.tnic> (raw)
In-Reply-To: <20181115061923.GA3971@dhcp-128-65.nay.redhat.com>
On Thu, Nov 15, 2018 at 02:19:23PM +0800, Dave Young wrote:
> It would be good to copy some background info from cover letter to the
> patch description so that we can get better understanding why this is
> needed now.
>
> BTW, Lianbo is working on a documentation of the vmcoreinfo exported
> fields. Ccing him so that he is aware of this.
>
> Also cc Boris, although I do not want the doc changes blocks this
> he might have different opinion :)
Yeah, my initial reaction is that exporting an mm-internal flag to
userspace is a no-no.
What would be better, IMHO, is having a general method of telling the
kdump kernel - maybe ranges of physical addresses - which to skip.
Because the moment there's a set of pages which do not have PG_offline
set but kdump would still like to skip, this breaks.
But that's mm guys' call.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
next prev parent reply other threads:[~2018-11-15 11:10 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-14 21:16 [PATCH RFC 0/6] mm/kdump: allow to exclude pages that are logically offline David Hildenbrand
2018-11-14 21:16 ` [PATCH RFC 1/6] mm: balloon: update comment about isolation/migration/compaction David Hildenbrand
2018-11-14 21:17 ` [PATCH RFC 2/6] mm: convert PG_balloon to PG_offline David Hildenbrand
2018-11-14 22:23 ` Matthew Wilcox
2018-11-14 22:49 ` David Hildenbrand
2018-11-15 2:07 ` Mike Rapoport
2018-11-15 9:21 ` David Hildenbrand
2018-11-15 12:19 ` Michal Hocko
2018-11-14 21:17 ` [PATCH RFC 3/6] kexec: export PG_offline to VMCOREINFO David Hildenbrand
2018-11-15 6:19 ` Dave Young
2018-11-15 9:23 ` David Hildenbrand
2018-11-15 11:10 ` Borislav Petkov [this message]
2018-11-15 11:20 ` David Hildenbrand
2018-11-15 11:52 ` Borislav Petkov
2018-11-15 12:01 ` David Hildenbrand
2018-11-15 17:58 ` Borislav Petkov
2018-11-15 12:11 ` Michal Hocko
2018-11-15 14:13 ` Borislav Petkov
2018-11-14 21:17 ` [PATCH RFC 4/6] xen/balloon: mark inflated pages PG_offline David Hildenbrand
2018-11-14 21:17 ` [PATCH RFC 5/6] hv_balloon: " David Hildenbrand
2018-11-14 21:17 ` [PATCH RFC 6/6] PM / Hibernate: exclude all PageOffline() pages David Hildenbrand
2018-11-15 7:48 ` Pavel Machek
2018-11-15 12:23 ` Michal Hocko
2018-11-15 12:29 ` David Hildenbrand
2018-11-14 22:57 ` [PATCH RFC 0/6] mm/kdump: allow to exclude pages that are logically offline Nadav Amit
2018-11-14 23:05 ` David Hildenbrand
2018-11-14 23:41 ` Nadav Amit
2018-11-15 1:42 ` Julien Freche
2018-11-16 18:23 ` David Hildenbrand
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