[LU-6260] more support for 3.16 linux kernel

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Labels: patch
• Environment: 3.16 kernel
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

earlier LU-5322 was closed out to capture those kernel support fixes that landed for 2.7.0
There are still outstanding issues that we don't have fixes for yet. Those will be done in later lustre versions, so creating this new ticket to track them.

One known issue first mentioned 15/Sep/14:

With the switch to 3.16 now seeing new build failures, even in client only builds. example errors:

  CC [M]  /home/bogl/lustre-release/lustre/llite/llite_capa.o
  CC [M]  /home/bogl/lustre-release/lustre/llite/rw26.o
/home/bogl/lustre-release/lustre/llite/rw26.c:700:9: error: initialization from incompatible pointer type [-Werror]
         .direct_IO      = ll_direct_IO_26,
         ^
/home/bogl/lustre-release/lustre/llite/rw26.c:700:9: error: (near initialization for ‘ll_aops.direct_IO’) [-Werror]
cc1: all warnings being treated as errors
make[6]: *** [/home/bogl/lustre-release/lustre/llite/rw26.o] Error 1
make[5]: *** [/home/bogl/lustre-release/lustre/llite] Error 2
make[4]: *** [/home/bogl/lustre-release/lustre] Error 2
make[3]: *** [_module_/home/bogl/lustre-release] Error 2
make[3]: Leaving directory `/usr/src/kernels/3.16.2-200.fc20.x86_64'
make[2]: *** [modules] Error 2
make[2]: Leaving directory `/home/bogl/lustre-release'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/bogl/lustre-release'
make: *** [all] Error 2

Recent comment in LU-5322 said this fix is still TBD.

Issue Links

• is blocked by: LU-6567 sanity test_69: test failed to respond and timed out
• is related to: LU-7052 iovec created with iov_iter_get_pages_alloc must be freed with kvfree
• is related to: LU-7382 (vvp_io.c:573:vvp_io_update_iov()) ASSERTION( vio->vui_tot_nrsegs >= vio->vui_iter->nr_segs ) failed
• is related to: LU-6215 Sync Lustre external tree with lustre linux kernel client
• is related to: LU-5322 support for 3.16 linux kernel