linux-kernel - Re: unified percpu stuff

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]

Message-ID: <49818842.5020004@goop.org>
Date:	Thu, 29 Jan 2009 02:43:14 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Tejun Heo <htejun@...il.com>
CC:	Brian Gerst <brgerst@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Gerd Hoffmann <kraxel@...hat.com>
Subject: Re: unified percpu stuff

Tejun Heo wrote:
> The current tj-percpu[1] contains Brian's commit which consolidates
> load_gs_base() into switch_to_new_gdt(), 

There's a bit of a bootstrap problem using switch_to_new_gdt() on the 
boot CPU: it uses smp_processor_id, which ends up doing a 
percpu_read(cpu_number), which naturally crashes because %gs isn't set 
up yet.  Perhaps switch_to_new_gdt() should take the cpu number as a 
parameter (or at least a __switch_to_new_gdt variant which does).

    J

--
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/