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[Qemu-devel] [PATCH] qemu will core dump with "-smp 254, sockets=2, cor
From: |
lijun |
Subject: |
[Qemu-devel] [PATCH] qemu will core dump with "-smp 254, sockets=2, cores=3, threads=2" |
Date: |
Fri, 13 Dec 2013 02:10:20 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 |
Hi all,
when set "-smp" more than 160, qemu will give the following warning:
Warning: Number of SMP cpus requested (161) exceeds the recommended cpus
supported by KVM (160)
As the above warning, when set "-smp 160,sockets=2,cores=3,threads=2",
but find that apic_id(hw/i386/acpi-build.c) is 259 not 159 and
id(hw/acpi/piix4.c) is 259 not 159.
As the above warning, when set "-smp 254,sockets=2,cores=3,threads=2",
but find that apic_id(hw/i386/acpi-build.c) is 513 not 253 and
id(hw/acpi/piix4.c) is 513 not 253.
Based on above reasons, we have two methods to fix this issue.
1, Delete "assert(apic_id <= MAX_CPUMASK_BITS)" in file
"hw/i386/acpi-build.c" and delete "g_assert((id / 8) < PIIX4_PROC_LEN)"
in file "hw/acpi/piix4.c".
2, Detect the values of "sockets,cores,threads" when get them from
command line. And modify smp_parse function in file vl.c to do some
restrictions on these parameters when boot qemu.
I will submit the code patch later.
Best Regards,
Jun Li
- [Qemu-devel] [PATCH] qemu will core dump with "-smp 254, sockets=2, cores=3, threads=2",
lijun <=
- Re: [Qemu-devel] [PATCH] qemu will core dump with "-smp 254, sockets=2, cores=3, threads=2", lijun, 2013/12/14
- Re: [Qemu-devel] [PATCH] qemu will core dump with "-smp 254, sockets=2, cores=3, threads=2", Peter Maydell, 2013/12/14
- Re: [Qemu-devel] [PATCH] qemu will core dump with "-smp 254, sockets=2, cores=3, threads=2", Eric Blake, 2013/12/16
- Re: [Qemu-devel] [PATCH] qemu will core dump with "-smp 254, sockets=2, cores=3, threads=2", Eduardo Habkost, 2013/12/16