Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.debian.kernel > #65300 > unrolled thread
| Started by | Salvatore Bonaccorso <carnil@debian.org> |
|---|---|
| First post | 2019-10-03 17:10 +0200 |
| Last post | 2019-10-03 23:00 +0200 |
| Articles | 2 — 2 participants |
Back to article view | Back to linux.debian.kernel
This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by
below is the oldest one visible, not the original post.
Bug#941637: linux-image-4.19.0-6-amd64: noht flag on command line has no effect for 6 core/12 Thread Ryzens Salvatore Bonaccorso <carnil@debian.org> - 2019-10-03 17:10 +0200
Bug#941637: linux-image-4.19.0-6-amd64: noht flag on command line has no effect for 6 core/12 Thread Ryzens Anton Ivanov <anton.ivanov@kot-begemot.co.uk> - 2019-10-03 23:00 +0200
| From | Salvatore Bonaccorso <carnil@debian.org> |
|---|---|
| Date | 2019-10-03 17:10 +0200 |
| Subject | Bug#941637: linux-image-4.19.0-6-amd64: noht flag on command line has no effect for 6 core/12 Thread Ryzens |
| Message-ID | <yNaTT-7hW-3@gated-at.bofh.it> |
Control: tags -1 + moreinfo Hi On Thu, Oct 03, 2019 at 09:24:26AM +0100, Anton Ivanov wrote: > Package: src:linux > Version: 4.19.67-2+deb10u1 > Severity: important > > Dear Maintainer, > > noht has no effect. > > I have been trying to chase down a weird hang which occurs only on 6 > core/12 thread Ryzens (I cannot reproduce it on 4/8 or older CPUs). > > As a part of that I tried to disable ht. Well, it cannot be disabled > - the noht command line arg has no effect whatosever. > > As ht can be a security hole this may have security implications as > well. Do you mean 'nosmt'? (See kernel-parameters.txt). You can find further information as well in Documentation/admin-guide/hw-vuln/l1tf.rst. Regards, Salvatore
[toc] | [next] | [standalone]
| From | Anton Ivanov <anton.ivanov@kot-begemot.co.uk> |
|---|---|
| Date | 2019-10-03 23:00 +0200 |
| Message-ID | <yNgmB-240-1@gated-at.bofh.it> |
| In reply to | #65300 |
On 03/10/2019 16:06, Salvatore Bonaccorso wrote: > Control: tags -1 + moreinfo > > Hi > > On Thu, Oct 03, 2019 at 09:24:26AM +0100, Anton Ivanov wrote: >> Package: src:linux >> Version: 4.19.67-2+deb10u1 >> Severity: important >> >> Dear Maintainer, >> >> noht has no effect. >> >> I have been trying to chase down a weird hang which occurs only on 6 >> core/12 thread Ryzens (I cannot reproduce it on 4/8 or older CPUs). >> >> As a part of that I tried to disable ht. Well, it cannot be disabled >> - the noht command line arg has no effect whatosever. >> >> As ht can be a security hole this may have security implications as >> well. > Do you mean 'nosmt'? (See kernel-parameters.txt). > > You can find further information as well in > Documentation/admin-guide/hw-vuln/l1tf.rst. I picked up noht from an older document somewhere and I cannot remember the actual source. It was definitely in the older version of RHEL guides, etc. I can see that the parameter is nosmt now. You can close the bug. > > Regards, > Salvatore > -- Anton R. Ivanov https://www.kot-begemot.co.uk/
[toc] | [prev] | [standalone]
Back to top | Article view | linux.debian.kernel
csiph-web