linux-kernel - Re: [PATCH v3 00/12] dso/dsos memory savings and clean up

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Date: Mon, 22 Apr 2024 13:59:27 -0700
From: Ian Rogers <irogers@...gle.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Ingo Molnar <mingo@...hat.com>, Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, Kan Liang <kan.liang@...ux.intel.com>, 
	James Clark <james.clark@....com>, Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, 
	Colin Ian King <colin.i.king@...il.com>, Leo Yan <leo.yan@...ux.dev>, Song Liu <song@...nel.org>, 
	Ilkka Koskinen <ilkka@...amperecomputing.com>, Ben Gainey <ben.gainey@....com>, 
	K Prateek Nayak <kprateek.nayak@....com>, Yanteng Si <siyanteng@...ngson.cn>, 
	Yicong Yang <yangyicong@...ilicon.com>, Sun Haiyong <sunhaiyong@...ngson.cn>, 
	Ravi Bangoria <ravi.bangoria@....com>, Anne Macedo <retpolanne@...teo.net>, 
	Changbin Du <changbin.du@...wei.com>, Andi Kleen <ak@...ux.intel.com>, 
	Thomas Richter <tmricht@...ux.ibm.com>, Masami Hiramatsu <mhiramat@...nel.org>, 
	zhaimingbing <zhaimingbing@...s.chinamobile.com>, Li Dong <lidong@...o.com>, 
	Paran Lee <p4ranlee@...il.com>, elfring@...rs.sourceforge.net, 
	Markus Elfring <Markus.Elfring@....de>, Yang Jihong <yangjihong1@...wei.com>, 
	Chengen Du <chengen.du@...onical.com>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH v3 00/12] dso/dsos memory savings and clean up

On Mon, Apr 22, 2024 at 1:55 PM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> On Mon, Apr 22, 2024 at 01:06:46PM -0700, Namhyung Kim wrote:
> > On Thu, Apr 11, 2024 at 11:42 AM Arnaldo Carvalho de Melo
> > <acme@...nel.org> wrote:
> > >
> > > On Tue, Apr 09, 2024 at 11:42:02PM -0700, Ian Rogers wrote:
> > > > 12 more patches from:
> > > > https://lore.kernel.org/lkml/20240202061532.1939474-1-irogers@google.com/
> > > > a near half year old adventure in trying to lower perf's dynamic
> > > > memory use. Bits like the memory overhead of opendir are on the
> > > > sidelines for now, too much fighting over how
> > > > distributions/C-libraries present getdents. These changes are more
> > > > good old fashioned replace an rb-tree with a sorted array and add
> > > > reference count tracking.
> > > >
> > > > The changes migrate dsos code, the collection of dso structs, more
> > > > into the dsos.c/dsos.h files. As with maps and threads, this is done
> > > > so the internals can be changed - replacing a linked list (for fast
> > > > iteration) and an rb-tree (for fast finds) with a lazily sorted
> > > > array. The complexity of operations remain roughly the same, although
> > > > iterating an array is likely faster than iterating a linked list, the
> > > > memory usage is at least reduce by half.
> > >
> > > Got the first 5 patches, would be nice if more people could review it,
> > > I'll try and get back to is soon.
> >
> > For the series:
> >
> > Acked-by: Namhyung Kim <namhyung@...nel.org>
>
> It is not applying right now, I've just merged with torvalds/master and
> I'm running build tests now, will push to tmp.perf-tools-next right now.

Ok, do you want me to rebase on tmp.perf-tools-next?

Thanks,
Ian

> - Arnaldo