Thank you for writing the patch.
I will try it later.
However, the bug is a regression caused by commit 296291cd ("mm: make
sendfile(2) killable") to the upstream of Linux kernel.
[1]https://github.com/torvalds/linux/commit/296291cd
This produces infinite -EINTR loop in mm/filemap.c:generic_perform_write().
Perhaps it can also affect filesystems other than AUFS.
So I think it's possible to keep current AUFS, and put a patch to Linux
kernel.
I would like to hear your opinion.
I also opened Linux kernel Bugzilla:
[2]https://bugzilla.kernel.org/show_bug.cgi?id=109971
2015-12-25 14:39 GMT+09:00 <[3]sf...@users.sourceforge.net>:
> > I'll continue to find the source of this EINTR loop.
> > Maybe this is a bug of Linux kernel itself (kernel/pid_namespace.c?)
rather
> > than AUFS, but I'm still not sure.
>
> Or aufs should support the case of PF_EXITING flag set in
> current->flags...
Here is my current and UNTESTED solution.
When you get boaring during holidays, I'd suggest you to try this patch
and enjoy debugging.
J. R. Okajima
References
1. https://github.com/torvalds/linux/commit/296291cd
2. https://bugzilla.kernel.org/show_bug.cgi?id=109971
3. mailto:sf...@users.sourceforge.net
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