Greg K-H
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88Followers
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@basisbit @kernellogger All depends on your workload, test it yourself to see.
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@kernellogger You forgot the Xen bugfix in there too, 3 things at once!
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Greg K-H
gregkh
@kernellogger It's patch Tuesday! {sigh} This has been a pain to get done, odds are it will take a few more cycles and fixups once it hits real testing...
RE: https://fosstodon.org/users/kernellogger/statuses/110855114931496454
RE: https://fosstodon.org/users/kernellogger/statuses/110855114931496454
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@T_X @kernellogger Current process is really complex, it literally is "Last kernel release of the year".
I have added a caveat when companies / developers abuse the end-of-year release deadline by throwing in crud too early that adds "If the last release of the year is just too unstable, I will pick the previous release instead." and that usually keeps people honest as no one wants to loose 3 months of work.
Been this way for many years now, it's well-known by the distros. It's up to them to decide to sync up with these releases or not, nothing I can do to force them to, except to point out that distros that do not are usually totally insecure and buggy and cost more to maintain, but that was their choice to make :)
I have added a caveat when companies / developers abuse the end-of-year release deadline by throwing in crud too early that adds "If the last release of the year is just too unstable, I will pick the previous release instead." and that usually keeps people honest as no one wants to loose 3 months of work.
Been this way for many years now, it's well-known by the distros. It's up to them to decide to sync up with these releases or not, nothing I can do to force them to, except to point out that distros that do not are usually totally insecure and buggy and cost more to maintain, but that was their choice to make :)
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@w8emv @kernellogger Try it yourself and find out!
Everything is now public for you to test with, and as always, different workloads have different impacts, so anything I might say, might not be relevant for your usage model at all.
Everything is now public for you to test with, and as always, different workloads have different impacts, so anything I might say, might not be relevant for your usage model at all.
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@kernellogger stable kernels now released with those fixes, if people need them (hint, microcode updates are better...)
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@krzk @kernellogger Android devices do this as they do control the bootloader, and they control their individual drivers, BUT not the core kernel image/source. sysfs interfaces are forbidden by default by the SELinux rules and adding an exception for an Android device for them is a real pain (which is a good thing.) So they default to command line options as it's trivial to do that in a driver and for them, it works well (again, full control over the command line options.)
But that isn't an acceptable interface for upstream, for all the same reasons :)
But that isn't an acceptable interface for upstream, for all the same reasons :)
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@jani @kernellogger Modifying the command line is hard, if not impossible, for almost everyone other than a developer. So for a developer, sure, use a module parameter for crazy debugging stuff. but NEVER ask a user to use it for a normal operation, or for something that you should be doing in a per-device way.
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@kernellogger If wearing a shirt with that on it actually made a difference, I'm all for it, but odds are, the people who I need to say this to wouldn't see it...
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@sj @krzk @kernellogger @minipli I have ALWAYS said that 4 week old results are better than no results at all. Especially if regressions are found, which is the most important thing to detect.
I get many "private" emails from companies that do 1-2 month syncs of the LTS branches in their private SoC trees usually saying "all is good!" which gets them into the habit of doing testing. And every once in a while, they do find a regression, which we work quickly to resolve (many times it's just "use the next version, this was already caught...)
So yes, merge with LTS, test, and let me know the results please.
I get many "private" emails from companies that do 1-2 month syncs of the LTS branches in their private SoC trees usually saying "all is good!" which gets them into the habit of doing testing. And every once in a while, they do find a regression, which we work quickly to resolve (many times it's just "use the next version, this was already caught...)
So yes, merge with LTS, test, and let me know the results please.
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@carrabelloy @kernellogger @krzk We don't need your money, we just need you to test stable kernels (and Linus's kernels) and tell us all is good, or if something breaks!
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@kernellogger @krzk You are exactly correct here. I hear it all the time, "your stable kernels aren't as tested as our Enterprise kernels are", resulting in "so why don't you test them and let me know the results" for which I never get an answer.
{sigh}
{sigh}
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@kernellogger "We want everything stable, except for this one new feature we MUST have" X thousands of customers = "enterprise kernel monster"
Or to quote someone wise, "Everybody wants progress, nobody wants change."
Or to quote someone wise, "Everybody wants progress, nobody wants change."
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@minipli @kernellogger CVEs are pointless and mean nothing for kernel patches, this shouldn't be news to you, see my talk from years ago for details, and it's only gotten worse since then: https://kernel-recipes.org/en/2019/talks/cves-are-dead-long-live-the-cve/
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Greg K-H
gregkh
Thanks to @jstultz for showing that the monstrosity of USB A-C-A with a magnetic C connector in the middle actually works! Saves me constantly having to plug/unplug my microphone and camera every other day into my well-worn USB hub.
John did it much better with one less adapter than I so this stack could be smaller if needed, but this is all I could find locally.
John did it much better with one less adapter than I so this stack could be smaller if needed, but this is all I could find locally.
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Greg K-H
gregkh
First talk I've given in person in a very long time, and it's on legal issues (the EU Cyber Resilience Act), I must have done something wrong in a past life:
https://kccnceu2023.sched.com/event/1Lnv0
Should be fun, if you are at KubeCon, stop by and ask questions, it's meant to be a discussion. A recording will be made public afterwards too.
https://kccnceu2023.sched.com/event/1Lnv0
Should be fun, if you are at KubeCon, stop by and ask questions, it's meant to be a discussion. A recording will be made public afterwards too.
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Greg K-H
gregkhbpftrace fun question of the week I’ve been beating my head against for a while now.
Given the following bpftrace program:
tracepoint:syscalls:sys_enter_open,
tracepoint:syscalls:sys_enter_openat
{
$g = "magic_command_to_exit_trace";
$s = str(args->filename);
printf("%s\n", $s);
if ($s == $g) {
exit();
}
}
I get the lovely warning:
WARNING: Addrspace mismatch
if ($s == $g) {
which I can understand. But what I can’t figure out is how to resolve this (hint, the program works just fine, when opening the “magic” file, the trace exits), as how to turn a literal string into the proper address space that args->filename is?
I’ve dug into too many bpftrace git commits to try to figure it out, to no luck. Anyone have a hint?
Oh, and if you want to see where this is used, it’s in this “fun” script: https://github.com/gregkh/gregkh-linux/blob/master/scripts/trace_kernel_build.sh
Warning, realpath takes a long time when processing millions of files, be patient when running the script.
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@brauner @monsieuricon In looking at the NL list, too many things on there that might trigger spam filters, or at the very least, rightly make people upset, so I'll stick with the default list for now.
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@brauner @monsieuricon Nice! You know you can localize the dice words, there's a wordlist_de.txt file in the package already on the distro I use, now to find a _nl.txt version...
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