linux-kernel - Re: [PATCH 1/1] fixup: alloc_tag: mark inaccurate allocation counters in /proc/allocinfo output

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Message-Id: <20250916175639.2368772636d5e543faa5b13b@linux-foundation.org>
Date: Tue, 16 Sep 2025 17:56:39 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Usama Arif <usamaarif642@...il.com>
Cc: Suren Baghdasaryan <surenb@...gle.com>, kent.overstreet@...ux.dev,
 vbabka@...e.cz, hannes@...xchg.org, rientjes@...gle.com,
 roman.gushchin@...ux.dev, harry.yoo@...cle.com, shakeel.butt@...ux.dev,
 00107082@....com, pyyjason@...il.com, pasha.tatashin@...een.com,
 souravpanda@...gle.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] fixup: alloc_tag: mark inaccurate allocation
 counters in /proc/allocinfo output

On Tue, 16 Sep 2025 21:50:51 +0100 Usama Arif <usamaarif642@...il.com> wrote:

> 
> 
> On 16/09/2025 17:01, Suren Baghdasaryan wrote:
> > Document new "accurate:no" marker.
> > 
> > Fixes: 39d117e04d15 ("alloc_tag: mark inaccurate allocation counters in /proc/allocinfo output")
> > Suggested-by: Andrew Morton <akpm@...ux-foundation.org>
> > Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
> > ---
> > Based on mm-new
> > 
> >  Documentation/filesystems/proc.rst | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
> > index 1776a06571c2..17668f82ff1c 100644
> > --- a/Documentation/filesystems/proc.rst
> > +++ b/Documentation/filesystems/proc.rst
> > @@ -1014,6 +1014,14 @@ If file version is 2.0 or higher then each line may contain additional
> >  For example if the counters are not accurate, the line will be appended with
> >  "accurate:no" pair.
> >  
> > +Supported markers in v2:
> > +accurate:no
> > +              Absolute values of the counters in this line are not
> 
> s/values/value/ maybe? :)

That's OK as-is.

> +              accurate because of the failure to allocate storage required
> 
> s/storage required/memory/

Sure.


From: Andrew Morton <akpm@...ux-foundation.org>
Subject: alloc_tag-mark-inaccurate-allocation-counters-in-proc-allocinfo-output-fix-fix
Date: Tue Sep 16 05:53:33 PM PDT 2025

simplification per Usama, reflow text

Cc: David Rientjes <rientjes@...gle.com>
Cc: David Wang <00107082@....com>
Cc: Johannes Weiner <hannes@...xchg.org>
Cc: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Pasha Tatashin <pasha.tatashin@...een.com>
Cc: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: Shakeel Butt <shakeel.butt@...ux.dev>
Cc: Sourav Panda <souravpanda@...gle.com>
Cc: Suren Baghdasaryan <surenb@...gle.com>
Cc: Usama Arif <usamaarif642@...il.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 Documentation/filesystems/proc.rst |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/Documentation/filesystems/proc.rst~alloc_tag-mark-inaccurate-allocation-counters-in-proc-allocinfo-output-fix-fix
+++ a/Documentation/filesystems/proc.rst
@@ -1016,11 +1016,11 @@ For example if the counters are not accu
 
 Supported markers in v2:
 accurate:no
-              Absolute values of the counters in this line are not
-              accurate because of the failure to allocate storage required
-              to track some of the allocations made at this location.
-              Deltas in these counters are accurate, therefore counters
-              can be used to track allocation size and count changes.
+              Absolute values of the counters in this line are not accurate
+              because of the failure to allocate memory to track some of the
+              allocations made at this location.  Deltas in these counters are
+              accurate, therefore counters can be used to track allocation size
+              and count changes.
 
 Example output.
 
_