| 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
| ||
|
Message-ID: <ZxKh_AWoRLgafKyC@gallifrey> Date: Fri, 18 Oct 2024 17:59:24 +0000 From: "Dr. David Alan Gilbert" <linux@...blig.org> To: Jens Axboe <axboe@...nel.dk> Cc: Borislav Petkov <bp@...en8.de>, Thomas Gleixner <tglx@...utronix.de>, the arch/x86 maintainers <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>, "regressions@...ts.linux.dev" <regressions@...ts.linux.dev> Subject: Re: AMD zen microcode updates breaks boot * Jens Axboe (axboe@...nel.dk) wrote: > On 10/18/24 10:45 AM, Dr. David Alan Gilbert wrote: > > * Borislav Petkov (bp@...en8.de) wrote: > >> On Fri, Oct 18, 2024 at 07:30:15AM -0600, Jens Axboe wrote: > >>> At least on mine, the BIOS has an option that says something like "L3 > >>> cache as numa domain", which is on and why there's 32 nodes on that box. > >>> It's pretty handy for testing since there's a crap ton of CPUs, as it > >>> makes affinity handling easier. > >> > >> Right, so two boxes I tested with this: > >> > >> * 2 socket, a bit different microcode: > >> > >> [ 22.947525] smp: Brought up 32 nodes, 512 CPUs > >> > >> * your CPU, one socket: > >> > >> [ 26.830137] smp: Brought up 16 nodes, 255 CPUs > > > > (Probably unrelated but...) > > What happened to number 256 ? > > Quick guess, maybe iommu was off, will cap it to 255. IIRC... Ah OK. Dave > -- > Jens Axboe > > -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux | Happy \ \ dave @ treblig.org | | In Hex / \ _________________________|_____ http://www.treblig.org |_______/
Powered by blists - more mailing lists