linux-kernel - Re: [PATCH 04/26] x86-64, NUMA: Unify {acpi|amd}_{numa_init|scan

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

Date:	Mon, 14 Feb 2011 10:00:15 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org, brgerst@...il.com,
	gorcunov@...il.com, shaohui.zheng@...el.com, rientjes@...gle.com,
	mingo@...e.hu, hpa@...ux.intel.com
Subject: Re: [PATCH 04/26] x86-64, NUMA: Unify {acpi|amd}_{numa_init|scan_nodes}()
 arguments and return values

On Mon, Feb 14, 2011 at 8:18 AM, Tejun Heo <tj@...nel.org> wrote:
> On Mon, Feb 14, 2011 at 08:14:36AM -0800, Yinghai Lu wrote:
>> when system have acpi support  but SRAT is NOT there,  new
>> acpi_numa_init() will return 0 just like SRAT is there and correct.
>> So it will skip AMD node scanning.
>
> How does it return 0?
>
> ...
>                cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
>                                            acpi_parse_memory_affinity,
>                                            NR_NODE_MEMBLKS);
> If there's no srat, cnt is zero.
>        }
>
>        /* SLIT: System Locality Information Table */
>        acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
>
>        acpi_numa_arch_fixup();
>
>        if (cnt <= 0)
> if cnt is zero, the if is taken
>                return cnt ?: -ENOENT;
> and as cnt is zero, -ENOENT is returned.
>        return 0;
> The function returns 0 iff cnt > 0.

oh, I missed it again.

Yinghai
--
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/