[LU-11200] Centos 8 arm64 server support

• Type: New Feature
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Affects Version/s: Lustre 2.12.0
• Assignee: James A Simmons
• Reporter: Oleg Drokin

Description

I am trying to bring up arm64 support for centos7 and it turns out centos 7 / rhel 7 for arm64 uses kernel 4.14 that we do not have any ldiskfs patches for.

I checked and the closest match is ubuntu18 4.15 kernel - the ldiskfs series has only a single trivial reject in ext4-data-in-dirent.patch

We also need a way to select it in configure that's a bit more complicated since I don't know how to do it easily yet.

Then there are compile errors:

/home/green/git/lustre-release/lustre/ptlrpc/../../lustre/ldlm/ldlm_lockd.c:135:74: error: macro "DEFINE_TIMER" requires 4 arguments, but only 2 given
 static CFS_DEFINE_TIMER(waiting_locks_timer, waiting_locks_callback, 0, 0);   
                                                                          ^

Issue Links

• is blocking: LU-12323 save_stack_trace_tsk is not exported on arm architectures
• is related to: LU-11224 T10PI assume several kernel features are enabled.
• is related to: LU-11832 ARM servers crashing on MDS startup
• is related to: LU-9793 sanity test 244 fail
• is related to: LU-11878 sanity test 103b: OOM because of too many bash processes: page allocation stalls for 18420ms
• is related to: LU-11246 New lustre e2fsprogs 1.44 issues
• is related to: LU-11440 Make e2fsprogs-1.44.3-wc1 release
• is related to: LU-12137 update client to use iterate_shared
• is related to: LU-10300 Can the Lustre 2.10.x clients support 64K kernel page?
• is related to: LU-11527 sanity test_270a failed with O_DIRECT on ARM
• is related to: LU-6387 Add Power8 support to Lustre
• is related to: LU-6766 add support for arm64