From: Dan Malek <dan@mvista•com>
To: linuxppc-dev <linuxppc-dev@lists•linuxppc.org>
Subject: context overflow
Date: Fri, 19 Jan 2001 21:27:44 -0500 [thread overview]
Message-ID: <3A68F7A0.693639F1@mvista.com> (raw)
I just heard about the bug Tom Gall fixed in "context_overflow"
by testing for current->mm == NULL.
I believe the proper solution is to use 'current->active_mm'
instead of 'current->mm' (and you never get a null pointer).
This way, the proper 'active' context is updated with a new
context even though a kernel thread has stolen it from somewhere
else to use. I think skipping the selection of a new context
in this case could be logically incorrect for some PowerPC cores.
-- Dan
--
I like MMUs because I don't have a real life.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next reply other threads:[~2001-01-20 2:27 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-20 2:27 Dan Malek [this message]
2001-01-22 4:28 ` context overflow Troy Benjegerdes
2001-01-22 4:39 ` Tom Gall
2001-01-22 18:10 ` Dan Malek
2001-01-22 18:55 ` tom_gall
2001-01-22 19:59 ` Dan Malek
2001-01-22 22:08 ` tom_gall
2001-01-23 0:10 ` Dan Malek
2001-01-23 10:00 ` Gabriel Paubert
2001-01-23 18:21 ` Dan Malek
2001-02-06 10:55 ` Paul Mackerras
2001-02-06 21:11 ` Dan Malek
2001-02-06 21:50 ` Paul Mackerras
2001-02-06 22:29 ` Dan Malek
2001-02-06 22:45 ` Paul Mackerras
2001-02-06 10:50 ` Paul Mackerras
2001-02-06 21:32 ` Dan Malek
2001-02-06 22:08 ` Paul Mackerras
2001-02-06 23:14 ` Dan Malek
2001-02-07 0:23 ` Paul Mackerras
2001-02-07 18:02 ` Dan Malek
2001-02-08 0:48 ` Paul Mackerras
2001-02-08 1:39 ` Frank Rowand
2001-02-08 19:00 ` David Edelsohn
2001-02-08 20:53 ` Roman Zippel
2001-02-08 21:14 ` David Edelsohn
2001-02-08 23:23 ` Roman Zippel
2001-02-08 23:48 ` Cort Dougan
2001-02-08 21:28 ` Cort Dougan
2001-02-08 22:08 ` David Edelsohn
2001-02-08 22:26 ` Cort Dougan
2001-02-08 23:17 ` David Edelsohn
2001-02-08 23:27 ` Cort Dougan
2001-02-08 23:28 ` Gabriel Paubert
2001-02-09 9:58 ` Paul Mackerras
2001-02-09 10:57 ` Gabriel Paubert
2001-02-09 11:26 ` Paul Mackerras
2001-02-09 10:49 ` Paul Mackerras
2001-02-07 9:18 ` Roman Zippel
2001-02-07 17:46 ` Dan Malek
2001-02-07 18:39 ` Roman Zippel
2001-02-07 21:16 ` Gabriel Paubert
2001-02-08 0:34 ` Paul Mackerras
2001-01-22 4:55 ` Larry McVoy
2001-01-22 6:15 ` Troy Benjegerdes
2001-01-23 1:12 ` Frank Rowand
2001-01-23 1:20 ` Dan Malek
2001-01-23 2:12 ` Frank Rowand
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