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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Borislav Petkov <bp@suse.de>, Rik van Riel <riel@surriel.com>,
	x86-ml <x86@kernel.org>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [GIT PULL] x86 FPU changes for 5.2
Date: Tue, 7 May 2019 23:59:26 +0200	[thread overview]
Message-ID: <20190507215925.3wfs7mia5aesedr2@linutronix.de> (raw)
In-Reply-To: <CAHk-=wh4Cjb1qDj_VRW9W4d4n9WLksgMKF-roG8eCk_O0ZaEEg@mail.gmail.com>

On 2019-05-07 10:35:25 [-0700], Linus Torvalds wrote:
> Has this gone through lots of testing, particularly with things like
> FP signal handling and old machines that don't necessarily have
> anything but the most basic FP state (ie Pentium class etc)?

I tried it in qemu with incremental FPU capabilities so it went through
all the possible load/restore variants during signal handling. I had a
testcase which did SHA1 computation and a received a SIGALRM every
second. This caught some bugs, most of them were xsave/xsaves related
once the SHA1 result did not match. I tried something similar one the
8087 FPU.
I had the series in the v5.0-RT tree which resulted in the most recent
patch in that branch.

>                Linus

Sebastian

  parent reply	other threads:[~2019-05-07 21:59 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-07 13:26 Borislav Petkov
2019-05-07 17:35 ` Linus Torvalds
2019-05-07 17:59   ` Borislav Petkov
2019-05-07 20:12   ` Ingo Molnar
2019-05-07 21:59   ` Sebastian Andrzej Siewior [this message]
2019-05-07 17:55 ` pr-tracker-bot

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