On Thu, 17 Jan 2019, Linus Torvalds wrote:

quoted

So that seems to deal with mincore() in a reasonable way indeed.

It doesn't unfortunately really solve the preadv2(RWF_NOWAIT), nor does it
provide any good answer what to do about it, does it?

As I suggested earlier in the thread, the fix for RWF_NOWAIT might be
to just move the test down to after readahead.

So I've done some basic smoke testing (~2 hours of LTP+xfstests) on the 
kernel with the three topmost patches from

	https://git.kernel.org/pub/scm/linux/kernel/git/jikos/jikos.git/log/?h=pagecache-sidechannel

applied (also attaching to this mail), and no obvious breakage popped up.

So if noone sees any principal problem there, I'll happily submit it with 
proper attribution etc.

Thanks,

-- 
Jiri Kosina
SUSE Labs