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Old 05-15-2019, 03:41 AM   #1306
GazL
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How does this latest mitigation for intel's incompetence effect performance?
 
Old 05-15-2019, 03:48 AM   #1307
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Quote:
Originally Posted by GazL View Post
How does this latest mitigation for intel's incompetence effect performance?
I had to disable hyperthreading in the bios of some of the xeon servers here so I would say "a lot"...
 
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Old 05-15-2019, 04:09 AM   #1308
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Gah, I had a lock up in 4.19.42 yesterday and was waiting for a more 'stable' 4.19.4x, doesn't look like that's going to be happening any time soon. Just as well I still have 4.19.34, I think I'll stick with that one until this blows over.

EDIT: The headers are from 4.19.42 but I don't know if this makes any difference.

EDIT2: apparently not.

Last edited by Lysander666; 05-15-2019 at 02:43 PM.
 
Old 05-15-2019, 08:16 AM   #1309
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Another round of updates has been scheduled for release Friday morning, GMT.

If no problems are found while testing the release candidates, they might be available sometime on Thursday (depending on your time zone).

All of the kernels currently maintained by Mr. Kroah-Hartman will be updated.

Last edited by cwizardone; 05-15-2019 at 08:20 AM.
 
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Old 05-15-2019, 05:27 PM   #1310
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Hope they also release a patched 4.4.x for these new Intel MDS(ZombieLoad) vulnerabilities.
The documentation is already available:
https://www.kernel.org/doc/html/late...-vuln/mds.html
 
Old 05-15-2019, 07:02 PM   #1311
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Quote:
Originally Posted by abga View Post
Hope they also release a patched 4.4.x for these new Intel MDS(ZombieLoad) vulnerabilities.
The documentation is already available:
https://www.kernel.org/doc/html/late...-vuln/mds.html
4.4.180 will have 266 patches. You can check here for patches you might be interested in,

http://lkml.iu.edu/hypermail/linux/k...5.1/06838.html
 
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Old 05-15-2019, 07:38 PM   #1312
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Quote:
Originally Posted by cwizardone View Post
4.4.180 will have 266 patches. You can check here for patches you might be interested in,

http://lkml.iu.edu/hypermail/linux/k...5.1/06838.html
Thanks! MDS mitigations are available in the changelog there. Need to wait now for the official release of 4.4.180, meanwhile preparing the systems - updating the microcode.
Wondering what the performance penalties would be with these kernel+microcode mitigations for MDS.

Found this official Intel article showing some charts:
https://www.intel.com/content/www/us...ology/mds.html
Phoronix looks busy running some benchmarks on his own, estimating an up to 10% performance cost...
https://www.phoronix.com/scan.php?pa...S-Kernel-Fixes
 
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Old 05-16-2019, 08:55 AM   #1313
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Kernel update 3.18.140 is now available at

https://www.kernel.org/

The change log,

https://cdn.kernel.org/pub/linux/ker...geLog-3.18.140
 
Old 05-16-2019, 10:50 AM   #1314
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This from http://lkml.iu.edu/hypermail/linux/k...5.1/06838.html kind of sums it all up.
Quote:
arch/x86/kernel/cpu/bugs.c | 643 +++++++++++++++++----
So, after 5.5 months, a vulnerability assigned a CVE in late 2018 is now being mitigated (I note that Windows 10 has also had an update to address this). Yet Intel claims it was previously aware.
From https://www.intel.com/content/www/us...ology/mds.html
Quote:
First identified by Intel's internal researchers and partners, and independently reported to Intel by external researchers...
At least the CEO at Volkswagen had the decency to resign when the company was caught cheating emission testing. Sadly, Intel is not displaying corporate accountability.

PS - And people wonder why a stable Slackware release is being delayed.
 
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Old 05-16-2019, 01:18 PM   #1315
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Kernel updates 5.1.3, 5.0.17, 4.19.44, 4.14.120, 4.9.177 and 4.4.180 are now available at

https://www.kernel.org/

The change logs,

https://cdn.kernel.org/pub/linux/ker...hangeLog-5.1.3

https://cdn.kernel.org/pub/linux/ker...angeLog-5.0.17

https://cdn.kernel.org/pub/linux/ker...ngeLog-4.19.44

https://cdn.kernel.org/pub/linux/ker...geLog-4.14.120

https://cdn.kernel.org/pub/linux/ker...ngeLog-4.9.177

https://cdn.kernel.org/pub/linux/ker...ngeLog-4.4.180

Dave's Unofficial Slackbuilt Kernel update for the 4.4.x series
can be found at, https://dusk.idlemoor.tk

Last edited by cwizardone; 05-16-2019 at 09:16 PM.
 
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Old 05-16-2019, 04:22 PM   #1316
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Quote:
Originally Posted by allend View Post
This from http://lkml.iu.edu/hypermail/linux/k...5.1/06838.html kind of sums it all up.

So, after 5.5 months, a vulnerability assigned a CVE in late 2018 is now being mitigated (I note that Windows 10 has also had an update to address this). Yet Intel claims it was previously aware.
From https://www.intel.com/content/www/us...ology/mds.html

At least the CEO at Volkswagen had the decency to resign when the company was caught cheating emission testing. Sadly, Intel is not displaying corporate accountability.

PS - And people wonder why a stable Slackware release is being delayed.
I noticed that statement myself and wondered, why on earth haven't they patched it earlier if they already knew about it...

Here they have a "Deep Dive" more detailed analysis covering all 4 CVEs:
https://software.intel.com/security-...-data-sampling

Related to the corporate responsibility, they already lost a CEO and I have a more practical suggestion, they should refund the performance loss (percentage) out of their "Recommended Customer Price" for all these vulnerabilities (Meltdown&co). This recommended price looks to be present for all their CPUs:
https://ark.intel.com/content/www/us...ml#@Processors

Last edited by abga; 05-16-2019 at 04:23 PM. Reason: typo
 
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Old 05-19-2019, 06:02 PM   #1317
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5.2-rc1

The newest "mainline" development kernel, version 5.2-rc1, has been been made available for testing.

The tarball, https://git.kernel.org/torvalds/t/linux-5.2-rc1.tar.gz

Mr. Torvalds' announcement, http://lkml.iu.edu/hypermail/linux/k...5.2/02345.html

Last edited by cwizardone; 05-19-2019 at 08:18 PM.
 
Old 05-20-2019, 07:43 AM   #1318
cwizardone
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To quote that great American philosopher ( ), Jackie Gleason, "And Away We Go."
https://en.wikipedia.org/wiki/Jackie_Gleason

Another round of updates has been scheduled for release just before Noon on Wednesday morning, GMT.

If no problems are found while testing the release candidates, they might be available sometime on Tuesday or early Wednesday morning (depending on your time zone).

Last edited by cwizardone; 05-20-2019 at 07:45 AM.
 
Old 05-20-2019, 12:38 PM   #1319
SCerovec
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Talking

Quote:
Originally Posted by allend View Post
[snip]

At least the CEO at Volkswagen had the decency to resign when the company was caught cheating emission testing. Sadly, Intel is not displaying corporate accountability.

PS - And people wonder why a stable Slackware release is being delayed.
Slackware can't afford resignation at CEO level - that's why the delay
 
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Old 05-20-2019, 01:40 PM   #1320
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Quote:
Originally Posted by abga View Post
Phoronix looks busy running some benchmarks on his own, estimating an up to 10% performance cost...
https://www.phoronix.com/scan.php?pa...S-Kernel-Fixes
Fresh benchmarks from Phoronix including the MDS mitigations performance impact (pretty long/detailed - skip to the last pages for conclusions):
https://www.phoronix.com/scan.php?pa...load-mit&num=1
https://www.phoronix.com/scan.php?pa...mds-xeon&num=1
 
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