| Hello!
I have only managed to get Xen 4.5's Remus "working" on Linux Kernels less than 3.5. The provided remus-drbd, as detailed in docs/README.remus and available from https://github.com/rshriram/remus-drbd will not compile with Linux Kernels 3.6 and above.
One of these errors is that remus-drbd uses a two argument version of the macro kunmap_atomic found in include/linux/highmem.h This was deprecated and is no longer included in any Kernels above 3.6.
"error: macro "kunmap_atomic" passed 2 arguments, but takes just 1"
Is there a patch available? If not, what set up do the Remus devs use to test? I just need a "stable-ish" platform to modify remus on.
Now I did get Remus "working" on Linux 3.4, Ubuntu 14.04, and the custom remus-drbd. The issue I run into is that Remus only plugs and unplugs a few hundred times until there is a "Connection timeout error." It could be that I am using an "old" linux kernel version without much Xen integration, but I'm stumped about this error:
### ... xc: progress: Reloading memory pages: 895015/65536 1365% xc: Saving memory: iter 1416 (last sent 568 skipped 0): 65536/65536 100% ... xc: Saving memory: iter 1420 (last sent 567 skipped 0): 65536/65536 100% xc: error: rdexact failed (select returned 0): Internal error xc: error: Error when reading batch size (110 = Connection timed out): Internal error xc: error: error when buffering batch, finishing (110 = Connection timed out): Internal error migration target: Remus Failover for domain 5 libxl: error: libxl_utils.c:430:libxl_read_exactly: file/stream truncated reading ipc msg header from domain 5 save/restore helper stdout pipe libxl: error: libxl_exec.c:129:libxl_report_child_exitstatus: domain 5 save/restore helper [-1] died due to fatal signal Broken pipe libxl: warning: libxl_dom.c:2015:domain_suspend_done: Remus: Domain suspend terminated with rc -3, teardown Remus devices... Remus: Backup failed? resuming domain at primary. xc: error: Dom 5 not suspended: (shutdown 0, reason 255): Internal error libxl: error: libxl.c:505:libxl__domain_resume: xc_domain_resume failed for domain 5: Invalid argument ###
Sincerely, Anthony | 
