The Red Hat model only worked for Red Hat

Post by murdoze » Wed, Apr 19, 2023, 10:38 AM UTC

bregma wrote: post #213

murdoze wrote: post #207

Earlier quoted context omitted.

We have discovered a critical bug in QNX 6 kernel in a networking scenario. There is no workaround, since the bug was in the core of their message passing infrastructure - a non-blocking by design kernel call, SendPulse(), sometimes blocks. It took me 9 months talking to them about this problem until I managed to reproduce it on just two nodes and half a page of code, and record kernel logs that clearly showed a race…

There is no safety-certified Linux. As far as I know there was no safety-certified QNX 6 either (QOS 1.0 was based on QNX 6.5 SP1, which is not the same as QNX 6 despite the numbers looking eerily similar). With a safety-certified system, you do not receive a patch because it violates the safety certification. Of course, you can get a patch and use it but then you're responsible for safety-certifying the entire stack…

Without this patch QNX was simply not usable, since it had a random race condition in the kernel, which just broke everything.

They have incorporated the patch into some QNX 6.5 version, but we had to deliver the product long before they did this.

Post by subpixel » Mon, Apr 24, 2023, 6:45 PM UTC

parasubvert wrote: post #175

rwmj wrote: post #89

(Note: I work for Red Hat) I'm constantly amazed that people still don't understand why Red Hat makes money, and this article won't enlighten you as it doesn't understand it as well as being full of other incidental mistakes (like their description of CentOS is way off the mark). Red Hat takes Linux and certifies it against all kinds of government, safety, privacy etc standardards, such as PCI and FIPS and numerous l…

This is partly true. It’s worth noting that Canonical/Ubuntu has the same certifications such as DISA/STIG and FIPS, and runs quite a bit in highly sensitive environments, often bundled by ISVs, such as VMware or Pivotal, where I’ve worked. Red Hat makes more money because they’re an enterprise software company and everyone thinks they’re just an OSS services company. They’re that too, but they are far more sophistic…

> most documentation are behind a paywall

this may have been, but is not true

Re: The Red Hat model only worked for Red Hat

Re: The Red Hat model only worked for Red Hat