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  1. It is not really possible to use nodatacow in a...

    It is not really possible to use nodatacow in a sane way with checksums in general, which is why ZFS does not do it. It could be that the LZ4 patch for btrfs has issues, but I am severely disinclined...
  2. The same likely applies to btrfs because many of...

    The same likely applies to btrfs because many of the ZFS patents should apply to btrfs as well. There is no patent grant in the GPLv2 and I am not aware of any patent grant by Oracle for the ZFS...
  3. ZFS does not have that problem. If you had an...

    ZFS does not have that problem. If you had an issue, you likely should have gotten in touch with the developers. If this is a hardware problem, then we cannot help you. A stab in the dark would be...
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    I suggested that the Gentoo kernel team do...

    I suggested that the Gentoo kernel team do something like this a few weeks ago, but they said that they had too much to do already. Having a distribution-specific kernel development repository where...
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    I should elaborate that tests fixes enable...

    I should elaborate that tests fixes enable continuous integration testing to automate a tedious task that developers would be doing manually. Consequently, no one cares that the fixes made the...
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    The tests can exercise the code in ways that...

    The tests can exercise the code in ways that trigger bugs involving leaks, which is useful in automated regression tests. However, if the tests themselves have leaks, actual memory leaks that would...
  7. perf can be used to profile the kernel. DTrace is...

    perf can be used to profile the kernel. DTrace is even better if you are lucky enough to have it. Anyway, profiling tools are useless unless you can define what you want to improve. Speed is not a...
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    Speak for yourself.

    Speak for yourself.
  9. Given that the software systemd starts is...

    Given that the software systemd starts is supposed to work on several platforms, that is not happening. Anyway, not much will ever require systemd. gdm is a rare exception.
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    It turns out this is not strictly correct. Older...

    It turns out this is not strictly correct. Older Linux kernels use the ts bit on x86 to try to avoid reloads as much as possible:

    http://stackoverflow.com/a/431323

    It is still basically what I...
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    You would need to implement it and prove to Linus...

    You would need to implement it and prove to Linus that it is better to use it. The general consensus is that such a thing is less efficient.

    With that said, all in-kernel SSE is done with...
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    The Linux kernel does not use a FPU in general....

    The Linux kernel does not use a FPU in general. Everything internally is integer based. The only registers kernel developers are allowed to use in general are the integer registers. x87, MMX, SSE and...
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    SSE2 instructions are disabled in Linux builds...

    SSE2 instructions are disabled in Linux builds via options sent to the compiler. This was a design decision in Linux to make context switches faster. Using them outside of special critical regions...
  14. You should look at OpenWRT. it runs on many...

    You should look at OpenWRT. it runs on many devices shipping today that have small amounts of flash by today's standards. Anyway, there is always someone with a bigger/smaller system. It is a bad...
  15. You are the one suggesting that there are such...

    You are the one suggesting that there are such people. The insinuation that I had anything to do with something like this is an ad hominem attack. While I might consider certain software to be junk,...
  16. If your system has only 4MB of storage, 2MB is...

    If your system has only 4MB of storage, 2MB is half of it. The kernel itself is typically 2-3MB on such systems. If you add systemd, your OS will no longer fit on the system. Also, it is not clear if...
  17. We were not talking about me. We were talking...

    We were not talking about me. We were talking about every other Gentoo developer. If every other Gentoo developer did not think like me, you can be certain systemd would not be permitted in the tree....
  18. You can do this today with sysctl. That is the...

    You can do this today with sysctl. That is the UNIX way of doing it.
  19. /proc is from Plan 9. It was not part of the...

    /proc is from Plan 9. It was not part of the original UNIX, although many UNIX systems adopted some form of it. Linux obtained it by virtue of being a System V kernel clone.
  20. You might want to rethink when you consider the...

    You might want to rethink when you consider the fact that I am at least willing to tolerate such things in the tree. If the other developers were not like me, these things would *NOT* be in Gentoo at...
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