From: Richard Gooch <rgooch@ras.ucalgary.ca>
To: Alexander Viro <viro@math.psu.edu>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Alan Cox quote? (was: Re: accounting for threads)
Date: Fri, 22 Jun 2001 08:53:25 -0600 [thread overview]
Message-ID: <200106221453.f5MErPg22986@vindaloo.ras.ucalgary.ca> (raw)
In-Reply-To: <Pine.GSO.4.21.0106211949280.209-100000@weyl.math.psu.edu>
In-Reply-To: <Pine.GSO.4.21.0106211931180.209-100000@weyl.math.psu.edu> <Pine.GSO.4.21.0106211949280.209-100000@weyl.math.psu.edu>
Alexander Viro writes:
> BTW, proc_net_create() is also not a good idea if you block the
> interrupts. Ditto for netlink_kernel_create(), AFAICS (due to
> netlink_kernel_creat() -> sock_alloc() -> get_empty_inode() ->
> kmem_cache_alloc() with SLAB_KERNEL).
>
> That, BTW, is a nice illustration - it's easy to get a preemption
> point without noticing, so holding spinlocks, let alone disabling
> interrupts over the large area is going to hurt like hell.
Here's an idea: add a CONFIGable debug mode for spinlock/cli
interaction with GFP_KERNEL and other (known) blocking operations.
Keep a per-CPU flag or bitmask that's manipulated by lock/cli
operations and checked by memory allocators and other key blocking
operations. Generate an Oops upon violation.
Make the CONFIG option initially set to 'y' for a patch level or two.
Regards,
Richard....
Permanent: rgooch@atnf.csiro.au
Current: rgooch@ras.ucalgary.ca
next prev parent reply other threads:[~2001-06-22 14:53 UTC|newest]
Thread overview: 156+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-19 14:53 accounting for threads Dan Kegel
2001-06-19 14:57 ` J . A . Magallon
2001-06-19 15:44 ` ognen
2001-06-19 15:58 ` Alan Cox quote? (was: Re: accounting for threads) Dan Kegel
2001-06-19 16:02 ` Ben Pfaff
2001-06-19 16:09 ` Larry McVoy
2001-06-19 16:26 ` Matthew Kirkwood
2001-06-19 16:52 ` Larry McVoy
2001-06-19 18:18 ` Rob Landley
2001-06-19 23:31 ` Timur Tabi
2001-06-20 11:52 ` Rob Landley
2001-06-20 21:20 ` Albert D. Cahalan
2001-06-20 18:12 ` Rob Landley
2001-06-20 23:28 ` Dan Podeanu
2001-06-21 0:42 ` D. Stimits
2001-06-20 20:18 ` Rob Landley
2001-06-21 1:57 ` D. Stimits
2001-06-21 14:46 ` Idea: Patches-from-linus mailing list? (Was Re: Alan Cox quote? (was: Re: accounting for threads)) Rob Landley
2001-06-21 14:02 ` Alan Cox quote? (was: Re: accounting for threads) Jesse Pollard
2001-06-21 14:18 ` Rob Landley
2001-06-22 14:46 ` Mikulas Patocka
2001-06-22 13:29 ` Rob Landley
2001-06-24 21:41 ` J . A . Magallon
2001-06-24 16:55 ` Rob Landley
2001-06-24 22:30 ` J . A . Magallon
2001-06-24 18:21 ` Rob Landley
2001-06-25 13:48 ` J . A . Magallon
2001-06-24 22:39 ` Steven Walter
2001-06-24 23:50 ` Larry McVoy
2001-06-24 20:24 ` Rob Landley
2001-06-25 0:05 ` J . A . Magallon
2001-06-25 0:32 ` Gerhard Mack
2001-06-25 0:59 ` Davide Libenzi
2001-06-25 2:18 ` Galen Hancock
2001-06-20 14:59 ` Matthias Urlichs
2001-06-20 19:14 ` Victor Yodaiken
2001-06-20 21:01 ` RE:Why use threads ( was: Alan Cox quote?) David Schwartz
2001-06-20 21:26 ` Why " Victor Yodaiken
2001-06-20 22:18 ` David Schwartz
2001-06-20 22:41 ` Davide Libenzi
2001-06-20 22:47 ` [OT] " Jeff Garzik
2001-06-21 0:21 ` David Schwartz
2001-06-21 0:56 ` Davide Libenzi
2001-06-21 1:32 ` David Schwartz
2001-06-21 2:22 ` Davide Libenzi
2001-06-21 2:43 ` David Schwartz
2001-06-21 16:10 ` Davide Libenzi
2001-06-21 19:55 ` Marco Colombo
2001-06-20 22:43 ` Mike Castle
2001-06-21 1:43 ` David Schwartz
2001-06-19 17:10 ` Alan Cox quote? (was: Re: accounting for threads) Matti Aarnio
2001-06-19 17:20 ` Mike Castle
2001-06-19 17:37 ` Larry McVoy
2001-06-19 17:45 ` Mike Castle
2001-06-19 19:38 ` Georg Nikodym
2001-06-19 19:56 ` Michael Meissner
2001-06-19 17:53 ` Steve Underwood
2001-06-19 19:01 ` Alan Cox
2001-06-20 2:57 ` Michael Rothwell
2001-06-20 3:04 ` Larry McVoy
2001-06-20 3:38 ` John R Lenton
2001-06-20 10:21 ` john slee
2001-06-20 18:08 ` Larry McVoy
2001-06-20 16:21 ` Davide Libenzi
2001-06-20 9:14 ` Alan Cox
2001-06-22 2:36 ` Michael Rothwell
2001-06-19 18:08 ` Georg Nikodym
2001-06-19 20:57 ` David S. Miller
2001-06-19 21:15 ` David S. Miller
2001-06-20 0:04 ` Chris Ricker
2001-06-20 0:59 ` Robert Love
2001-06-19 17:36 ` Jonathan Lundell
2001-06-19 17:41 ` Larry McVoy
2001-06-19 21:11 ` Jonathan Lundell
2001-06-19 23:56 ` Jonathan Lundell
2001-06-20 0:19 ` Mike Castle
2001-06-20 0:28 ` Larry McVoy
2001-06-20 1:30 ` Ben Greear
2001-06-20 2:14 ` Mike Castle
2001-06-20 9:00 ` Henning P. Schmiedehausen
2001-06-20 11:25 ` [OT] Threads, inelegance, and Java Aaron Lehmann
2001-06-20 11:25 ` Rob Landley
2001-06-20 17:36 ` Martin Dalecki
2001-06-20 19:27 ` Mike Harrold
2001-06-20 17:46 ` Rob Landley
2001-06-20 19:53 ` Martin Dalecki
2001-06-20 17:53 ` Rob Landley
2001-06-21 7:45 ` Albert D. Cahalan
2001-06-20 20:16 ` Pete Zaitcev
2001-06-20 22:05 ` Alan Cox
[not found] ` <20010621000725.A24672@werewolf.able.es>
2001-06-20 19:15 ` Rob Landley
2001-06-21 3:13 ` Pete Zaitcev
2001-06-21 13:59 ` Rob Landley
2001-06-21 9:40 ` Jonathan Morton
2001-06-21 16:48 ` Adam Sampson
2001-06-20 15:12 ` Ben Greear
2001-06-20 15:44 ` Russell Leighton
2001-06-20 16:32 ` Davide Libenzi
2001-06-20 16:54 ` Russell Leighton
2001-06-20 17:03 ` Tony Hoyle
2001-06-20 15:10 ` Rob Landley
2001-06-20 20:23 ` Tony Hoyle
2001-06-21 8:12 ` Henning P. Schmiedehausen
2001-06-20 20:40 ` Richard B. Johnson
2001-06-20 20:48 ` Tony Hoyle
2001-06-20 21:00 ` Daniel Phillips
2001-06-20 21:06 ` Richard B. Johnson
2001-06-20 18:14 ` Henning P. Schmiedehausen
2001-06-20 16:53 ` Larry McVoy
2001-06-20 12:36 ` Rob Landley
2001-06-20 21:14 ` Aaron Lehmann
2001-06-20 18:09 ` Henning P. Schmiedehausen
2001-06-20 19:05 ` William T Wilson
2001-06-19 16:02 ` Alan Cox quote? (was: Re: accounting for threads) David S. Miller
2001-06-19 16:12 ` Padraig Brady
2001-06-19 19:10 ` bert hubert
2001-06-19 19:18 ` Alan Cox
2001-06-19 19:32 ` bert hubert
2001-06-19 19:43 ` Alexander Viro
2001-06-20 15:22 ` Jes Sorensen
2001-06-20 15:33 ` Alexander Viro
2001-06-20 15:59 ` Threads are processes that share more bert hubert
2001-06-20 16:15 ` Alexander Viro
2001-06-20 18:48 ` Martin Devera
2001-06-20 19:19 ` Unknown PCI Net Device Greg Ingram
2001-06-20 22:53 ` Andreas Dilger
2001-06-20 22:56 ` Jeff Garzik
2001-06-20 23:00 ` Alan Cox
2001-06-20 22:08 ` Threads are processes that share more Stephen Satchell
2001-06-20 22:14 ` ognen
2001-06-20 23:10 ` J . A . Magallon
2001-06-24 23:47 ` Larry McVoy
2001-06-25 2:23 ` David S. Miller
2001-06-20 16:39 ` Alan Cox quote? (was: Re: accounting for threads) george anzinger
2001-06-20 18:35 ` Alexander Viro
2001-06-21 4:11 ` Rusty Russell
2001-06-21 23:37 ` Alexander Viro
2001-06-21 23:55 ` Alexander Viro
2001-06-22 14:53 ` Richard Gooch [this message]
2001-06-20 16:40 ` Jes Sorensen
2001-06-20 20:09 ` Rob Landley
2001-06-20 19:05 ` Victor Yodaiken
2001-06-20 14:35 ` Mike Porter
2001-06-20 11:56 ` Rob Landley
2001-06-19 18:01 ` Alan Cox quote? Kai Henningsen
2001-06-19 18:49 ` Larry McVoy
2001-06-19 20:12 ` Henning P. Schmiedehausen
2001-06-19 21:12 ` Richard Gooch
2001-06-19 22:50 ` Henning P. Schmiedehausen
2001-06-19 19:48 Alan Cox quote? (was: Re: accounting for threads) Joerg Pommnitz
2001-06-19 19:59 ` Alexander Viro
2001-06-20 19:36 Rok Papež
2001-06-20 20:16 ` Cort Dougan
2001-06-22 5:19 Chester Lott
[not found] <Pine.GSO.4.21.0106211931180.209-100000@weyl.math.psu.edu.suse.lists.linux.kernel>
2001-06-22 7:33 ` Andi Kleen
2001-06-30 9:16 Jan Hudec
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