linux-kernel - Re: [PATCH v3 2/3] docs/core-api: memory-allocation: remove uses of c:func:

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Date:   Thu, 24 Oct 2019 21:07:36 +0000
From:   Chris Packham <Chris.Packham@...iedtelesis.co.nz>
To:     "corbet@....net" <corbet@....net>
CC:     "rppt@...ux.ibm.com" <rppt@...ux.ibm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "willy@...radead.org" <willy@...radead.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v3 2/3] docs/core-api: memory-allocation: remove uses of
 c:func:

On Thu, 2019-10-24 at 14:57 -0600, Jonathan Corbet wrote:
> On Thu, 24 Oct 2019 20:51:23 +0000
> Chris Packham <Chris.Packham@...iedtelesis.co.nz> wrote:
> 
> > When I do actually get a series that applies to docs-next it'll
> > conflict with 59bb47985c1d ("mm, sl[aou]b: guarantee
> > natural alignment for kmalloc(power-of-two)") in Linus's tree.
> 
> Alternatively, if I sync up to -rc4, does the problem go away?  I should
> be able to explain that to Linus without too much trouble...
> 

Yes the series applies cleanly once docs-next is merged with v5.4-rc4.

There is a merge conflict between 6ee0fac199e1 ("docs: fix memory.low
description in cgroup-v2.rst") in your tree and 9783aa9917f8 ("mm,
memcg: proportional memory.{low,min} reclaim") in Linus's tree. Here's
the resolution I came up with in my test merge

diff --cc Documentation/admin-guide/cgroup-v2.rst
index 26d1cde6b34a,5361ebec3361..515c2d9eef84
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@@ -1117,8 -1120,11 +1120,11 @@@ PAGE_SIZE multiple when read back
  
        Best-effort memory protection.  If the memory usage of a
        cgroup is within its effective low boundary, the cgroup's
 -      memory won't be reclaimed unless memory can be reclaimed
 +      memory won't be reclaimed unless there is no reclaimable
-       memory available in unprotected cgroups.
+       from unprotected cgroups.  Above the effective low boundary (or
+       effective min boundary if it is higher), pages are reclaimed
+       proportionally to the overage, reducing reclaim pressure for
+       smaller overages.
  
        Effective low boundary is limited by memory.low values of
        all ancestor cgroups. If there is memory.low overcommitment