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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.