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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>,
	Christoph Lameter <cl@linux.com>,
	Pekka Enberg <penberg@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Tobin C . Harding" <me@tobin.cc>, linux-mm <linux-mm@kvack.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm/slab: Do not hash pointers when debugging slab
Date: Mon, 11 Dec 2017 09:08:15 +0100	[thread overview]
Message-ID: <CAMuHMdUugcEPjN+1KoLocpe0GsoXoi5qeXMXvfQSbhm5XDjv7Q@mail.gmail.com> (raw)
In-Reply-To: <CA+55aFzE0Z98KRT4rk3f3R0BcMqGMrHWHsaB9Aq02etwWm_hjg@mail.gmail.com>

Hi Linus,

On Sun, Dec 10, 2017 at 9:45 PM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Thu, Dec 7, 2017 at 2:17 AM, Geert Uytterhoeven
> <geert+renesas@glider.be> wrote:
>> -                               pr_err("Slab corruption (%s): %s start=%p, len=%d\n",
>> +                               pr_err("Slab corruption (%s): %s start=%px, len=%d\n",
>>                                        print_tainted(), cachep->name,
>>                                        realobj, size);
>
> and here, is the pointer actually interesting, or should we just give
> the offset to the allocation?

The pointer may help to identify e.g. an empty list_head in the written data.

> But if the pointer is interesting, then ack.

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

WARNING: multiple messages have this Message-ID
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>,
	Christoph Lameter <cl@linux.com>,
	Pekka Enberg <penberg@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Tobin C . Harding" <me@tobin.cc>, linux-mm <linux-mm@kvack.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm/slab: Do not hash pointers when debugging slab
Date: Mon, 11 Dec 2017 09:08:15 +0100	[thread overview]
Message-ID: <CAMuHMdUugcEPjN+1KoLocpe0GsoXoi5qeXMXvfQSbhm5XDjv7Q@mail.gmail.com> (raw)
In-Reply-To: <CA+55aFzE0Z98KRT4rk3f3R0BcMqGMrHWHsaB9Aq02etwWm_hjg@mail.gmail.com>

Hi Linus,

On Sun, Dec 10, 2017 at 9:45 PM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Thu, Dec 7, 2017 at 2:17 AM, Geert Uytterhoeven
> <geert+renesas@glider.be> wrote:
>> -                               pr_err("Slab corruption (%s): %s start=%p, len=%d\n",
>> +                               pr_err("Slab corruption (%s): %s start=%px, len=%d\n",
>>                                        print_tainted(), cachep->name,
>>                                        realobj, size);
>
> and here, is the pointer actually interesting, or should we just give
> the offset to the allocation?

The pointer may help to identify e.g. an empty list_head in the written data.

> But if the pointer is interesting, then ack.

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
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  reply	other threads:[~2017-12-11  8:08 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-07 10:17 Geert Uytterhoeven
2017-12-07 11:13 ` Christopher Lameter
2017-12-07 11:13   ` Christopher Lameter
2017-12-07 18:43   ` Kees Cook
2017-12-07 18:43     ` Kees Cook
2017-12-07 20:15     ` Christopher Lameter
2017-12-07 20:15       ` Christopher Lameter
2017-12-10 20:45 ` Linus Torvalds
2017-12-10 20:45   ` Linus Torvalds
2017-12-11  8:08   ` Geert Uytterhoeven [this message]
2017-12-11  8:08     ` Geert Uytterhoeven
2017-12-11 12:00   ` Christopher Lameter
2017-12-11 12:00     ` Christopher Lameter

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