Re: 4.8rc8 & OOM panic

On 09/28/16 21:45, Holger Hoffstätte wrote:

On 09/28/16 20:46, E V wrote:

quoted

I just booted my backup box with 4.8rc8 and started an rsync onto
btrfs and it panic'd with OOM a couple hours later. I thought the OOM
problems from 4.7 we're supposed to be fixed in 4.8, or did I get that
wrong? No users or anything else on the system.

Keep in mind that those problems are generic, other filesystems also
suffer: http://www.spinics.net/lists/linux-mm/msg114123.html

I don't see any recent compaction-related patches in Linus' tree at
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/mm/

Sorry, that was not quite correct. -stable 4.7.x and 4.8 contain
a workaround (http://goo.gl/DiwfPH) that is supposed to help.
That went into 4.8rc8 already, so not sure what happened in your case.

So unless they get merged in the last minute it looks like 4.8 will
be DOA.

Running 4.8 final now, let's see what happens..

-h