linux-kernel - Re: Major regression on hackbench with SLUB (more numbers)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20071222024434.GB6062@one.firstfloor.org>
Date:	Sat, 22 Dec 2007 03:44:34 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Matt Mackall <mpm@...enic.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...e.hu>,
	Christoph Lameter <clameter@....com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Major regression on hackbench with SLUB (more numbers)

On Fri, Dec 21, 2007 at 08:19:42PM -0600, Matt Mackall wrote:
> 
> On Sat, 2007-12-22 at 01:28 +0100, Andi Kleen wrote:
> > Ingo Molnar <mingo@...e.hu> writes:
> > 
> > > Christoph, /proc/slabinfo is an _ABI_. You HAVE to provide it. slabtop 
> > > relies on it, people use it every day to monitor memory consumption.
> > 
> > It's definitely not a stable ABI. slabtop tends to exit without any
> > error message on any slabinfo version number increase and I've seen
> > that happen several times in not so old kernels.
> > 
> > Requiring just another slabtop update isn't really a big deal.
> 
> Might as well mention that SLOB also doesn't provide this functionality,
> nor would it make any sense for it to try (because there are no
> slab-like objects to report about).

% slabinfo
Name                   Objects Objsize    Space Slabs/Part/Cpu  O/S O %Fr %Ef Flg
...
anon_vma                  1551      24    81.9K        20/18/2  128 0  90  45

Seems certainly like information that slabtop could report, even if it's
not exactly the same.

-Andi
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/