On Fri, Nov 02, 2018 at 02:45:42AM +0000, Dexuan Cui wrote:

quoted

From: Roman Gushchin <redacted>
Sent: Thursday, November 1, 2018 17:58

On Fri, Nov 02, 2018 at 12:16:02AM +0000, Dexuan Cui wrote:
Hello, Dexuan!

A couple of issues has been revealed recently, here are fixes
(hashes are from the next tree):

5f4b04528b5f mm: don't reclaim inodes with many attached pages
5a03b371ad6a mm: handle no memcg case in memcg_kmem_charge()
properly

These two patches should be added to the serie.

Thanks for the new info!

quoted

Re stable backporting, I'd really wait for some time. Memory reclaim is a
quite complex and fragile area, so even if patches are correct by themselves,
they can easily cause a regression by revealing some other issues (as it was
with the inode reclaim case).

I totally agree. I'm now just wondering if there is any temporary workaround,
even if that means we have to run the kernel with some features disabled or
with a suboptimal performance?

I'm not sure what workload you're seeing it on, but if you could merge
these 7 patches and see that it solves the problem you're seeing and
doesn't cause any regressions it'll be a useful test for the rest of us.

--
Thanks,
Sasha