On 3/5/19 5:48 PM, Johnny Hughes wrote:> On 3/4/19 3:39 PM, Mike McTernan (wavemobile) wrote: > > Looking around, I found the following repo: > > https://mirrors.dotsrc.org/centos-altarch/7/kernel/i386/...> That directory (kernel/ under altarch) is basically for the armhfp main kernel, > but we are building also for aarch64, i386 and even x86_64. Its purpose > (other than armhfp, where it is the main kernel) is mainly for IoT type > hardware (think hobby boards, embedded systems, etc that need newer > kernels for hardware support .. think things like this: > > https://www.intel.com/content/www/us/en/products/solutions/iot.html > > or > > 64 bit aarch64 bit type IoT boards, etc. > > You certainly CAN use them on anything you want and it will be maintained > as it is the main kernel for armhfp.That?s excellent, and most helpful. So that brings support for newer hardware, AND provides a PAE version which works on all my hardware nicely. This might be useful to a number of people, and it was only through looking around CentOS 7 on Raspberry Pi that I happened across the kernel repo. Might it be worth linking to the repo from the AltArch/i386 page: https://wiki.centos.org/SpecialInterestGroup/AltArch/i386> Both of these branches / repos are NOT designed to run Enterprise type > workloads (that is why we have the main RH kernel from RHEL sources) ..Yep - wise words and duly noted, thank you. My application is small scale, so should be fine. Software is only as good as the testing anyway :-) Last question, if I may - Is there any specific reason why an i686 PAE kernel built from the main RHEL sources isn't in the AltArch i386 os- repo? Notably CentOS 6 provided both non-PAE and PAE 32-bit kernels, and it's that step from CentOS 6 32-bit PAE onto CentOS 7 32-bit which made me stumble, but okay now. Many Thanks again, Mike -- wavemobile Warning: The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender immediately and delete the material from any computer. wavemobile Ltd is registered in England and Wales, Registration Number: 04780898.
On 3/6/19 6:26 AM, Mike McTernan (wavemobile) wrote:> On 3/5/19 5:48 PM, Johnny Hughes wrote: >> On 3/4/19 3:39 PM, Mike McTernan (wavemobile) wrote:<snip>> Last question, if I may - Is there any specific reason why an i686 PAE kernel > built from the main RHEL sources isn't in the AltArch i386 os- repo? > > Notably CentOS 6 provided both non-PAE and PAE 32-bit kernels, and it's > that step from CentOS 6 32-bit PAE onto CentOS 7 32-bit which made me > stumble, but okay now. >The only reason is .. it is not included in the mainline RHEL 7 kernel source code. The kernel we are using there is our CentOS Plus kernel. The reason it is the CentOS Plus kernel is that the RHEL 7 kernel SPEC does not build anything on i386 except the kernel-headers rpm. We already make modifications to produce a CentOS Plus kernel for x86_64 .. so we also rolled in changes for making that kernel build on i386. Since it does not do PAE by default, we don't do it. CentOS QA team member Akemi Yagi maintains the plus kernels for both CentOS-6 and CentOS-7 and QA team member (and armhfp AltArch maintainer) Pablo Greco also helps her frequently to make changes to that kernel to make it work with i386. I have no objections trying to make PAE work with that kernel .. Patches accepted :D https://bugs.centos.org/view.php?id=6828 -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20190306/c75d208a/attachment.sig>
On 3/6/19 1:28 PM, Johnny Hughes wrote:> On 3/6/19 6:26 AM, Mike McTernan (wavemobile) wrote: > > On 3/5/19 5:48 PM, Johnny Hughes wrote:<snip>> > Last question, if I may - Is there any specific reason why an i686 PAE > > kernel built from the main RHEL sources isn't in the AltArch i386 os- repo? > > > > Notably CentOS 6 provided both non-PAE and PAE 32-bit kernels, and > > it's that step from CentOS 6 32-bit PAE onto CentOS 7 32-bit which > > made me stumble, but okay now. > > The only reason is .. it is not included in the mainline RHEL 7 kernel source > code.Ah - I guess since mainline RHEL 7 is only 64-bit on x86 now, it doesn't have to worry about PAE vs non-PAE kernels. ...> I have no objections trying to make PAE work with that kernel .. Patches > accepted :D > > https://bugs.centos.org/view.php?id=6828So with what I know now (thank you!) I recon the mainline 4.14 is probably a better tested path for a 32-bit x86 PAE kernel, rather than starting at RHEL 7. And since you are already building that kernel it's good news all round :-) Kind Regards, Mike -- wavemobile Warning: The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender immediately and delete the material from any computer. wavemobile Ltd is registered in England and Wales, Registration Number: 04780898.