linux-kernel - disabled APICs being counted as processors ?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140123221316.GA23367@redhat.com>
Date:	Thu, 23 Jan 2014 17:13:16 -0500
From:	Dave Jones <davej@...hat.com>
To:	x86@...nel.org
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: disabled APICs being counted as processors ?

I have a system with 4 cores (configured with CONFIG_NR_CPUS=4) that shows during boot..

[    0.000000] smpboot: 8 Processors exceeds NR_CPUS limit of 4

it looks like this is because..

[    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x04] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x06] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0xff] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0xff] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0xff] disabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0xff] disabled)

Should the CPU counting code be ignoring those disabled APICs ?

	Dave
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/