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From: "Paul E. McKenney" <paulmck@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, rcu@vger.kernel.org,
	linux-mm@kvack.org, cl@linux.com, penberg@kernel.org,
	rientjes@google.com, iamjoonsoo.kim@lge.com, ming.lei@redhat.com,
	axboe@kernel.dk, kernel-team@fb.com
Subject: Re: [PATCH v4 sl-b 0/6] Export return addresses etc. for better diagnostics
Date: Wed, 6 Jan 2021 15:42:12 -0800
Message-ID: <20210106234212.GA20560@paulmck-ThinkPad-P72> (raw)
In-Reply-To: <20210106134843.ed8e298da92d4fe93b6aa259@linux-foundation.org>

On Wed, Jan 06, 2021 at 01:48:43PM -0800, Andrew Morton wrote:
> On Tue, 5 Jan 2021 17:16:03 -0800 "Paul E. McKenney" <paulmck@kernel.org> wrote:
> > This is v4 of the series the improves diagnostics by providing access
> > to additional information including the return addresses, slab names,
> > offsets, and sizes collected by the sl*b allocators and by vmalloc().
> Looks reasonable.  And not as bloaty as I feared, but it does add ~300
> bytes to my allnoconfig build.  Is the CONFIG_ coverage as tight as it
> could be?

Glad I managed to exceed your expectations.  ;-)

Let's see...  When I do an allnoconfig build, it has CONFIG_PRINTK=n.
Given that this facility is based on printk(), I could create an
additional patch that #ifdef'ed everything out in CONFIG_PRINTK=n kernels.
This would uglify things a bit, but it would save ~300 bytes.

If I don't hear otherwise from you, I will put something together,
test it, and send it along.

							Thanx, Paul

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-06  1:16 Paul E. McKenney
2021-01-06  1:17 ` [PATCH mm,percpu_ref,rcu 1/6] mm: Add mem_dump_obj() to print source of memory block paulmck
2021-01-08 13:50   ` Vlastimil Babka
2021-01-08 19:01     ` Paul E. McKenney
2021-01-08 19:41       ` Vlastimil Babka
2021-01-06  1:17 ` [PATCH mm,percpu_ref,rcu 2/6] mm: Make mem_dump_obj() handle NULL and zero-sized pointers paulmck
2021-01-06  1:17 ` [PATCH mm,percpu_ref,rcu 3/6] mm: Make mem_dump_obj() handle vmalloc() memory paulmck
2021-01-08 15:30   ` Vlastimil Babka
2021-01-06  1:17 ` [PATCH mm,percpu_ref,rcu 4/6] mm: Make mem_obj_dump() vmalloc() dumps include start and length paulmck
2021-01-08 15:30   ` Vlastimil Babka
2021-01-06  1:17 ` [PATCH mm,percpu_ref,rcu 5/6] rcu: Make call_rcu() print mem_dump_obj() info for double-freed callback paulmck
2021-01-06  1:17 ` [PATCH mm,percpu_ref,rcu 6/6] percpu_ref: Dump mem_dump_obj() info upon reference-count underflow paulmck
2021-01-06 21:48 ` [PATCH v4 sl-b 0/6] Export return addresses etc. for better diagnostics Andrew Morton
2021-01-06 23:42   ` Paul E. McKenney [this message]
2021-01-08  0:26     ` Paul E. McKenney
2021-01-08 15:35       ` Vlastimil Babka
2021-01-08 17:36         ` Paul E. McKenney

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