Matthew Burgess wrote: > On Fri, 21 Jan 2011 15:48:09 -0600, Bruce Dubbs <bruce.du...@gmail.com> wrote: > >> OK, so do we use 2.6.30.2 (LFS-6.5)? Do we need to update any other >> packages in the requirements or make everything from LFS-6.5 (Aug 2009)? >> Right now, the minimum requirements are from LFS-6.3 (Aug 2007). > > If we set it to 2.6.30 (there's no point in adding the stable version as > Glibc only checks the major.minor.patch level), we'll miss out on > F_GETOWN_EX (new in 2.6.32 - see http://lwn.net/Articles/354842/) and > recvmmsg (new in 2.6.33 - see http://lwn.net/Articles/334854/) support.
We won't actually miss out on either of those, because that's not what --enable-kernel= changes. It only removes compatibility code for older kernels; it does *not* cause glibc to omit support for newer syscalls or newer flags (assuming they're in the headers it was built against, and assuming it knows about them at all). If a program is running against such a glibc on a too-old kernel (that doesn't support those syscalls or flags), it will generally get ENOSYS or EINVAL errors. So I don't see a need, feature-wise, to raise the minimum kernel version at all. :-) Except for the glibc failures -- but it seems to me that these are likely due to a bug in glibc. When the two __ASSUME_BLAHBLAH symbols are defined to different values, I think it's generating incorrect code. But I haven't been able to reproduce it, or strace the test file, or gdb the test file, so I can't tell what the bug is yet. :-( > Release dates of those kernels are as follows: > > 2.6.30 - 10-Jun-2009 > 2.6.32 - 03-Dec-2009 > 2.6.33 - 24-Feb-2010 > > So, by the time LFS-6.8 is released, 2.6.33 will have been out for just over > 12 months. Given that most major distros have moved to a 6-month release > cycle, and that LFS-6.7 also meets that dependency, I don't think it's an > overly hard-to-meet requirement, so I propose bumping it straight up to > 2.6.33. > > Thoughts? > > Matt. >
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