linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Alexey Kardashevskiy <aik@ozlabs.ru>, linuxppc-dev@lists.ozlabs.org
Cc: v4.9+@ozlabs.ru, Alexey Kardashevskiy <aik@ozlabs.ru>,
	Greg Kurz <groug@kaod.org>,
	stable@vger.kernel.org, linux-kernel@vger.kernel.org,
	Paul Mackerras <paulus@samba.org>,
	"Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>,
	#@ozlabs.ru
Subject: Re: [kernel,v2] powerpc/iommu: Do not call PageTransHuge() on tail pages
Date: Thu, 20 Apr 2017 08:04:19 +1000 (AEST)	[thread overview]
Message-ID: <3w7bcz5ZT4z9s7k@ozlabs.org> (raw)
In-Reply-To: <20170411075457.28020-1-aik@ozlabs.ru>

On Tue, 2017-04-11 at 07:54:57 UTC, Alexey Kardashevskiy wrote:
> The CMA pages migration code does not support compound pages at
> the moment so it performs few tests before proceeding to actual page
> migration.
> 
> One of the tests - PageTransHuge() - has VM_BUG_ON_PAGE(PageTail()) as
> it is designed to be called on head pages only. Since we also test for
> PageCompound(), and it contains PageTail() and PageHead(), we can
> simplify the check by leaving just PageCompound() and therefore avoid
> possible VM_BUG_ON_PAGE.
> 
> Fixes: 2e5bbb5461f1 ("KVM: PPC: Book3S HV: Migrate pinned pages out of CMA")
> Cc: stable@vger.kernel.org # v4.9+
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> Acked-by: Balbir Singh <bsingharora@gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/e889e96e98e8da97bd39e46b725361

cheers

      parent reply	other threads:[~2017-04-19 22:04 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-11  7:54 [PATCH kernel v2] " Alexey Kardashevskiy
2017-04-11  8:20 ` Balbir Singh
2017-04-19 22:04 ` Michael Ellerman [this message]

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=3w7bcz5ZT4z9s7k@ozlabs.org \
    --to=patch-notifications@ellerman.id.au \
    --cc=#@ozlabs.ru \
    --cc=aik@ozlabs.ru \
    --cc=aneesh.kumar@linux.vnet.ibm.com \
    --cc=groug@kaod.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=paulus@samba.org \
    --cc=stable@vger.kernel.org \
    --cc=v4.9+@ozlabs.ru \
    --subject='Re: [kernel,v2] powerpc/iommu: Do not call PageTransHuge() on tail pages' \
    /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

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).