MALLOC =memkind compile related issues about keydb

[JohnSully]

I appreciate you taking the time to look at it!

I'm available on the gitter chat as well.

If you have autotools installed then my best guess is its finding the system's memkind headers or you didn't do a "make distclean". There's a bug where sometimes memkind fails to incrementally recompile. I don't modify memkind frequently so I haven't been motivated to fix that yet :)

Regardless once I have a CentOS machine up I can look in more detail. I need to finish up with issue #27 first.

[JohnSully]

Its important to note that the memkind used in KeyDB is a patched version with extra functionality. KeyDB will not compile with an official version unless it also has the necessary changes. These aren't trivial things, but rather additionally functionality to support fork(), and preventing the leaking of disk space.

memkind_tmpfile is one such example of additional APIs I've had to add.

If you are able to post the build results of that perhaps I can help now. Otherwise I will try on centos in the next few days.

Edit: Also should mention I do want to eventually upstream the changes, but there's a lot of things higher on the priority list right now.

[fmunteanu]

@JohnSully let's wait when you are available, I can provide you the source rpm with all needed files. It will compile fine with MALLOC=jemalloc switch but fail with MALLOC=memkind switch. We could work together on this, for now I will release it with jemalloc enabled.

[fmunteanu]

I'm going to make also the missing man files for all keydb binaries.

[JohnSully]

Had a chance to look at CentOS 6. The kernel on my fresh install is 2.6.32 which does not have the FICLONE ioctl needed for the memkind allocator to work. I believe 4.5 is the minimum kernel that can support it. Given that I don't believe the memkind allocator can be enabled unless CentOS decides to update their kernel.

I've fixed the PRIu64 issue that was referenced in another CentOS bug.

Please reopen if there are any other issues I haven't addressed.