From: Michal Hocko <mhocko@kernel.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Sasha Levin <sashal@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Alexander Duyck <alexander.duyck@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
stable <stable@vger.kernel.org>,
Mikhail Zaslonko <zaslonko@linux.ibm.com>,
Gerald Schaefer <gerald.schaefer@de.ibm.com>,
Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>,
Dave Hansen <dave.hansen@intel.com>,
Alexander Duyck <alexander.h.duyck@linux.intel.com>,
Pasha Tatashin <Pavel.Tatashin@microsoft.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Sasha Levin <alexander.levin@microsoft.com>,
linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH AUTOSEL 4.14 62/95] mm, memory_hotplug: initialize struct pages for the full memory section
Date: Tue, 7 May 2019 19:43:36 +0200 [thread overview]
Message-ID: <20190507174336.GU31017@dhcp22.suse.cz> (raw)
In-Reply-To: <20190507173655.GA1403@bombadil.infradead.org>
On Tue 07-05-19 10:36:55, Matthew Wilcox wrote:
> On Tue, May 07, 2019 at 07:32:24PM +0200, Michal Hocko wrote:
> > On Tue 07-05-19 13:18:06, Sasha Levin wrote:
> > > Michal, is there a testcase I can plug into kselftests to make sure we
> > > got this right (and don't regress)? We care a lot about memory hotplug
> > > working right.
> >
> > As said in other email. The memory hotplug tends to work usually. It
> > takes unexpected memory layouts which trigger corner cases. This makes
> > testing really hard.
>
> Can we do something with qemu? Is it flexible enough to hotplug memory
> at the right boundaries?
No idea. But I have tried to describe those layouts in the changelog so
if somebody can come up with a way to reproduce them under kvm/qemu I
would really appreciate that.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2019-05-07 17:43 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190507053826.31622-1-sashal@kernel.org>
2019-05-07 5:37 ` [PATCH AUTOSEL 4.14 21/95] mm: fix inactive list balancing between NUMA nodes and cgroups Sasha Levin
2019-05-07 5:37 ` [PATCH AUTOSEL 4.14 62/95] mm, memory_hotplug: initialize struct pages for the full memory section Sasha Levin
2019-05-07 16:31 ` Alexander Duyck
2019-05-07 16:50 ` Linus Torvalds
2019-05-07 17:02 ` Sasha Levin
2019-05-07 17:13 ` Gerald Schaefer
2019-05-07 17:15 ` Linus Torvalds
2019-05-07 17:18 ` Sasha Levin
2019-05-07 17:32 ` Michal Hocko
2019-05-07 17:36 ` Matthew Wilcox
2019-05-07 17:43 ` Linus Torvalds
2019-05-07 17:51 ` Michal Hocko
2019-05-07 17:43 ` Michal Hocko [this message]
2019-05-07 17:45 ` Sasha Levin
2019-05-07 17:54 ` Michal Hocko
2019-05-08 11:04 ` Gerald Schaefer
2019-05-07 17:31 ` Michal Hocko
2019-05-07 16:58 ` Sasha Levin
2019-05-07 5:38 ` [PATCH AUTOSEL 4.14 71/95] Revert "mm, memory_hotplug: initialize struct pages for the full memory section" Sasha Levin
2019-05-07 17:25 ` Alexander Duyck
2019-05-07 5:38 ` [PATCH AUTOSEL 4.14 86/95] mm/memory.c: fix modifying of page protection by insert_pfn() Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190507174336.GU31017@dhcp22.suse.cz \
--to=mhocko@kernel.org \
--cc=Pavel.Tatashin@microsoft.com \
--cc=akpm@linux-foundation.org \
--cc=alexander.duyck@gmail.com \
--cc=alexander.h.duyck@linux.intel.com \
--cc=alexander.levin@microsoft.com \
--cc=dave.hansen@intel.com \
--cc=gerald.schaefer@de.ibm.com \
--cc=heiko.carstens@de.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mikhail.v.gavrilov@gmail.com \
--cc=sashal@kernel.org \
--cc=schwidefsky@de.ibm.com \
--cc=stable@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=willy@infradead.org \
--cc=zaslonko@linux.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).