From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Santosh Sivaraj <santosh@fossix.org>,
Reza Arbab <arbab@linux.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC PATCH] powerpc/mm/mce: Keep irq disabled during lockless page table walk
Date: Fri, 20 Sep 2019 18:36:10 +1000 (AEST) [thread overview]
Message-ID: <46ZRrV2YtTz9sCJ@ozlabs.org> (raw)
In-Reply-To: <20190918145328.28602-1-aneesh.kumar@linux.ibm.com>
On Wed, 2019-09-18 at 14:53:28 UTC, "Aneesh Kumar K.V" wrote:
> __find_linux_mm_pte return a page table entry pointer walking the
> page table without holding locks. To make it safe against a THP
> split and collapse, we disable interrupts around the lockless
> page table walk. We need to keep the interrupts disabled as long
> as we use the page table entry pointer.
>
> Cc: Balbir Singh <bsingharora@gmail.com>
> Cc: Reza Arbab <arbab@linux.ibm.com>
> Cc: Santosh Sivaraj <santosh@fossix.org>
> Fixes: ba41e1e1ccb9 ("powerpc/mce: Hookup derror (load/store) UE errors")
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/d9101bfa6adc831bda8836c4d774820553c14942
cheers
prev parent reply other threads:[~2019-09-20 8:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-18 14:53 [RFC PATCH] powerpc/mm/mce: Keep irq disabled during lockless page table walk Aneesh Kumar K.V
2019-09-20 8:36 ` 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=46ZRrV2YtTz9sCJ@ozlabs.org \
--to=patch-notifications@ellerman.id.au \
--cc=aneesh.kumar@linux.ibm.com \
--cc=arbab@linux.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=santosh@fossix.org \
/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).