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From: Sebastian Andrzej Siewior <>
To: Linus Torvalds <>
Cc: Borislav Petkov <>, Rik van Riel <>,
	x86-ml <>, lkml <>
Subject: Re: [GIT PULL] x86 FPU changes for 5.2
Date: Tue, 7 May 2019 23:59:26 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

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


  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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