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From: Richard Weinberger <richard@nod.at>
To: anton ivanov <anton.ivanov@cambridgegreys.com>
Cc: linux-um <linux-um@lists.infradead.org>,
	 Johannes Berg <johannes@sipsolutions.net>
Subject: Re: [PATCH v4] um: Enable preemption in UML
Date: Thu, 21 Sep 2023 23:55:08 +0200 (CEST)	[thread overview]
Message-ID: <1842425402.67064.1695333308356.JavaMail.zimbra@nod.at> (raw)
In-Reply-To: <ac09760c-90fd-2209-a85c-5f33380238fc@cambridgegreys.com>

----- Ursprüngliche Mail -----
> Von: "anton ivanov" <anton.ivanov@cambridgegreys.com>
> An: "richard" <richard@nod.at>
> CC: "linux-um" <linux-um@lists.infradead.org>, "Johannes Berg" <johannes@sipsolutions.net>
> Gesendet: Donnerstag, 21. September 2023 23:41:16
> Betreff: Re: [PATCH v4] um: Enable preemption in UML

> On 21/09/2023 22:02, Richard Weinberger wrote:
>> ----- Ursprüngliche Mail -----
>>> Von: "anton ivanov" <anton.ivanov@cambridgegreys.com>
>>> An: "linux-um" <linux-um@lists.infradead.org>
>>> CC: "Johannes Berg" <johannes@sipsolutions.net>, "richard" <richard@nod.at>,
>>> "anton ivanov"
>>> <anton.ivanov@cambridgegreys.com>
>>> Gesendet: Donnerstag, 21. September 2023 17:55:22
>>> Betreff: [PATCH v4] um: Enable preemption in UML
>>> From: Anton Ivanov <anton.ivanov@cambridgegreys.com>
>>>
>>> Preemption requires saving/restoring FPU state. This patch
>>> adds support for it using GCC intrinsics.
>> This patch triggers here the following splat:
> 
> Ack. I will look into it tomorrow.

Thx!
I had a brief look, UML's init_IRQ() seems to return now with interrupts enabled.
Dunno why, I need some sleep now.

> 
> There will be places where it will bomb out. F.E. I am chasing one is
> triggered by the NFS server (it may be the same as in this trace - it
> happens around the end of the initial setup).
> 
> All in all it looks better than I expected.

True that! :-)

Thanks,
//richard

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  reply	other threads:[~2023-09-21 21:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-21 15:55 [PATCH v4] um: Enable preemption in UML anton.ivanov
2023-09-21 15:59 ` Anton Ivanov
2023-09-21 17:11 ` Peter Lafreniere
2023-09-21 21:02 ` Richard Weinberger
2023-09-21 21:41   ` Anton Ivanov
2023-09-21 21:55     ` Richard Weinberger [this message]
2023-09-22  6:31       ` Anton Ivanov

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