linux-kernel - Re: [PATCH v3 00/35] Memory allocation profiling

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Date: Wed, 14 Feb 2024 17:02:28 +0100
From: Michal Hocko <mhocko@...e.com>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Johannes Weiner <hannes@...xchg.org>,
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Subject: Re: [PATCH v3 00/35] Memory allocation profiling

On Wed 14-02-24 10:01:14, Kent Overstreet wrote:
> On Wed, Feb 14, 2024 at 03:46:33PM +0100, Michal Hocko wrote:
> > On Wed 14-02-24 01:20:20, Johannes Weiner wrote:
> > [...]
> > > I agree we should discuss how the annotations are implemented on a
> > > technical basis, but my take is that we need something like this.
> > 
> > I do not think there is any disagreement on usefulness of a better
> > memory allocation tracking. At least for me the primary problem is the
> > implementation. At LFSMM last year we have heard that existing tracing
> > infrastructure hasn't really been explored much. Cover letter doesn't
> > really talk much about those alternatives so it is really hard to
> > evaluate whether the proposed solution is indeed our best way to
> > approach this.
> 
> Michal, we covered this before.

It is a good practice to summarize previous discussions in the cover
letter. Especially when there are different approaches discussed over a
longer time period or when the topic is controversial.

I do not see anything like that here. Neither for the existing tracing
infrastructure, page owner nor performance concerns discussed before
etc. Look, I do not want to nit pick or insist on formalisms but having
those data points layed out would make any further discussion much more
smooth.

-- 
Michal Hocko
SUSE Labs