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Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors
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From: |
Peter Maydell |
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Subject: |
Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors |
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Date: |
Fri, 27 Feb 2015 08:00:25 +0900 |
On 27 February 2015 at 07:51, Eduardo Habkost <address@hidden> wrote:
> On Fri, Feb 27, 2015 at 07:44:29AM +0900, Peter Maydell wrote:
>> When can it actually fail? Have you seen it do this in practice?
>> (Note that this is only called from fork, so we know that
>> cpu_model must be valid, or we would have failed on startup
>> trying to create the CPU for the initial thread.)
>
> I have never seen it in practice, but in x86 it will fail if we try to
> create more than 254 VCPUs.
That's bad -- it's not hard to imagine a program with 256
threads. Why does x86 have this limitation and can we fix it?
That seems like the better course than this patch.
-- PMM
- Re: [Qemu-devel] [PULL 05/11] target-i386: Eliminate cpu_init() function, (continued)
[Qemu-devel] [PULL 06/11] target-i386: Simplify error handling on cpu_x86_init_user(), Eduardo Habkost, 2015/02/25
[Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Eduardo Habkost, 2015/02/25
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Andreas Färber, 2015/02/25
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Peter Maydell, 2015/02/25
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Eduardo Habkost, 2015/02/26
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Peter Maydell, 2015/02/26
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Eduardo Habkost, 2015/02/26
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors,
Peter Maydell <=
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Eduardo Habkost, 2015/02/26
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Peter Maydell, 2015/02/26
- Re: [Qemu-devel] [PULL 08/11] linux-user: Check for cpu_init() errors, Eduardo Habkost, 2015/02/27
[Qemu-devel] [PULL 07/11] target-i386: Move CPUX86State.cpuid_apic_id to X86CPU.apic_id, Eduardo Habkost, 2015/02/25
[Qemu-devel] [PULL 09/11] target-i386: Set APIC ID using cpu_index on CONFIG_USER, Eduardo Habkost, 2015/02/25
[Qemu-devel] [PULL 10/11] target-i386: Require APIC ID to be explicitly set before CPU realize, Eduardo Habkost, 2015/02/25
[Qemu-devel] [PULL 11/11] target-i386: Move APIC ID compatibility code to pc.c, Eduardo Habkost, 2015/02/25