From: Tom Zanussi <zanussi@kernel.org>
To: Allen Martin <amartin@nvidia.com>
Cc: linux-rt-users@vger.kernel.org, anup.pemmaiah@gmail.com,
bigeasy@linutronix.de
Subject: Re: ARMv8 fp register corruption in 4.14 PREEMPT_RT series
Date: Thu, 28 Mar 2019 09:18:34 -0500 [thread overview]
Message-ID: <1553782714.2655.2.camel@kernel.org> (raw)
In-Reply-To: <20190327213555.GA16845@nvidia.com>
Hi Allen,
On Wed, 2019-03-27 at 14:35 -0700, Allen Martin wrote:
> Hi Tom, I can confirm the ARMv8 fp register corruption reported here:
>
> https://marc.info/?l=linux-rt-users&m=153930857708206&w=2
>
> still exists in 4.14.106-rt56. I was able to reproduce this on both
> A57 and Carmel ARMv8 CPUs using the float_bessel subtest of
> LTP. This
> fix was to backport the following patch from 4.18.y-rt to 4.14-rt:
>
> 3afdfe419c33c1655d0763e070350aad44416594
> arm64: fpsimd: use preemp_disable in addition to local_bh_disable()
>
> Are you able to pick up this patch into 4.14-rt? I'm sure Anup and I
> are not the only ones who are hitting this.
>
Yes, I was just about to start a new 4.14 update and will pull this one
in. Thanks for letting me know.
Tom
> -Allen
prev parent reply other threads:[~2019-03-28 14:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 21:35 ARMv8 fp register corruption in 4.14 PREEMPT_RT series Allen Martin
2019-03-28 14:18 ` Tom Zanussi [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=1553782714.2655.2.camel@kernel.org \
--to=zanussi@kernel.org \
--cc=amartin@nvidia.com \
--cc=anup.pemmaiah@gmail.com \
--cc=bigeasy@linutronix.de \
--cc=linux-rt-users@vger.kernel.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).