From: Allen Martin <amartin@nvidia.com>
To: <zanussi@kernel.org>
Cc: <linux-rt-users@vger.kernel.org>, <anup.pemmaiah@gmail.com>,
<bigeasy@linutronix.de>
Subject: ARMv8 fp register corruption in 4.14 PREEMPT_RT series
Date: Wed, 27 Mar 2019 14:35:55 -0700 [thread overview]
Message-ID: <20190327213555.GA16845@nvidia.com> (raw)
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.
-Allen
next reply other threads:[~2019-03-27 21:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 21:35 Allen Martin [this message]
2019-03-28 14:18 ` ARMv8 fp register corruption in 4.14 PREEMPT_RT series Tom Zanussi
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