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From:   Dexuan Cui <decui@microsoft.com>
To:     Roman Gushchin <guro@fb.com>
CC:     "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Kernel Team <Kernel-team@fb.com>,
        Shakeel Butt <shakeelb@google.com>,
        Michal Hocko <mhocko@kernel.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Tejun Heo <tj@kernel.org>, Rik van Riel <riel@surriel.com>,
        Konstantin Khlebnikov <koct9i@gmail.com>,
        Matthew Wilcox <willy@infradead.org>,
        "Stable@vger.kernel.org" <Stable@vger.kernel.org>
Subject: RE: Will the recent memory leak fixes be backported to longterm
 kernels?
Thread-Topic: Will the recent memory leak fixes be backported to longterm
 kernels?
Thread-Index: AdRyQEG5VIfdELkdR3eQ5BGm0rZVcwABuNOAAAOCDwA=
Date:   Fri, 2 Nov 2018 02:45:42 +0000
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> From: Roman Gushchin <guro@fb.com>
> Sent: Thursday, November 1, 2018 17:58
>=20
> On Fri, Nov 02, 2018 at 12:16:02AM +0000, Dexuan Cui wrote:
> Hello, Dexuan!
>=20
> A couple of issues has been revealed recently, here are fixes
> (hashes are from the next tree):
>=20
> 5f4b04528b5f mm: don't reclaim inodes with many attached pages
> 5a03b371ad6a mm: handle no memcg case in memcg_kmem_charge()
> properly
>=20
> These two patches should be added to the serie.

Thanks for the new info!
=20
> 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 themsel=
ves,
> 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 workaroun=
d,
even if that means we have to run the kernel with some features disabled or
with a suboptimal performance?

Thanks!
--Dexuan