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From: "Alex Bennée" <alex.bennee@linaro.org>
To: luigi burdo <intermediadc@hotmail.com>
Cc: David Gibson <david@gibson.dropbear.id.au>,
	Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	"programmingkidx@gmail.com" <programmingkidx@gmail.com>,
	"qemu-ppc@nongnu.org" <qemu-ppc@nongnu.org>,
	"bharata@linux.vnet.ibm.com" <bharata@linux.vnet.ibm.com>,
	"rth@twiddle.net" <rth@twiddle.net>
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH v2 0/3] Enable MTTCG on PPC64
Date: Sun, 09 Apr 2017 15:27:29 +0100	[thread overview]
Message-ID: <871st1wt9q.fsf@linaro.org> (raw)
In-Reply-To: <AM5P194MB01292723DDB978AC78F8FDD7C80E0@AM5P194MB0129.EURP194.PROD.OUTLOOK.COM>


luigi burdo <intermediadc@hotmail.com> writes:

> Hi David and Nikuji,
>
> can i suggest to remove the message:
>
>
> Guest not yet converted to MTTCG - you may get unexpected results
> where the mttcg is enabled?

Have you declared the memory ordering for the guest?

>
> another thing im finding  is this message
> Guest expects a stronger memory ordering than the host provides
> This may cause strange/hard to debug errors

See ca759f9e387db87e1719911f019bc60c74be9ed8 for an example.

>
>
> I have 8 gb on my machine and this message come if i gave 512mb on the guest too.
>
> Is possible know where the mttcg is already enabled?
>
> i see on x86,i386,arm too if i set thread=multy the qemu start using the other host cores is on this guest system enabled?
>
> if yes i have the same messages of ppc64 too :
>
> Guest not yet converted to MTTCG - you may get unexpected results
>
> and
>
> Guest expects a stronger memory ordering than the host provides
> This may cause strange/hard to debug errors
>
>
> Ciao
>
> Luigi
>
>
> Applied to ppc-for-2.10.  Anyone object to that for 2/3, which isn't
> within ppc code?


--
Alex Bennée

  reply	other threads:[~2017-04-09 14:27 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-07  6:07 [Qemu-devel] [PATCH v2 0/3] Enable MTTCG on PPC64 Nikunj A Dadhania
2017-04-07  6:07 ` [Qemu-devel] [PATCH v2 1/3] target/ppc: Emulate LL/SC using cmpxchg helpers Nikunj A Dadhania
2017-04-07 18:26   ` Richard Henderson
2017-04-07  6:07 ` [Qemu-devel] [PATCH v2 2/3] cputlb: handle first atomic write to the page Nikunj A Dadhania
2017-04-07  6:07 ` [Qemu-devel] [PATCH v2 3/3] target/ppc: Generate fence operations Nikunj A Dadhania
2017-04-07 18:27   ` Richard Henderson
2017-04-07 17:49 ` [Qemu-devel] [Qemu-ppc] [PATCH v2 0/3] Enable MTTCG on PPC64 luigi burdo
2017-04-07 19:29   ` G 3
2017-04-07 20:11     ` luigi burdo
2017-04-08 11:16       ` luigi burdo
2017-04-09 14:17         ` Alex Bennée
2017-04-08  6:51 ` [Qemu-devel] " David Gibson
2017-04-09  8:41   ` [Qemu-devel] [Qemu-ppc] " luigi burdo
2017-04-09 14:27     ` Alex Bennée [this message]
2017-04-09 17:10       ` luigi burdo
2017-04-10  5:43       ` Nikunj A Dadhania
2017-04-10  7:12         ` Alex Bennée
2017-04-10  7:47           ` Nikunj A Dadhania
2017-04-09 17:00   ` [Qemu-devel] " Richard Henderson

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