Re: infinite loop on startup

[Stas Sergeev <stsp@aknet.ru>]

[-- Attachment #1: Type: text/plain, Size: 820 bytes --]


Hello.

James B. Hiller wrote:
> Please let me know if this looks like your issue, and if you need
> anything else.
Yes, from the log it looks exactly the
same problem I have observed.
And here is the fix:
http://www.uwsg.indiana.edu/hypermail/linux/kernel/0405.0/1242.html

It is SMP-unsafe though, so in case you
have an SMP box with preemption enabled,
you'd better wait till the next kernel
-pre release:
http://www.uwsg.indiana.edu/hypermail/linux/kernel/0405.0/1265.html

Or you can use the attached patch instead,
which does exactly what Linus said. But I
haven't tested that one due to a lack of an
SMP box handy.

The problem is that noone yet have audithed
the 2.6 kernel for dosemu-compatibility the
way it was done with 2.4. So using 2.6 with
dosemu is not recommended yet, but I already
started that work.

[-- Attachment #2: tss_iobtm1.diff --]
[-- Type: text/plain, Size: 508 bytes --]


--- linux/arch/i386/kernel/process.c	2004-04-14 09:41:14.000000000 +0400
+++ linux/arch/i386/kernel/process.c	2004-05-07 14:54:13.000000000 +0400
@@ -292,8 +292,12 @@
 
 	/* The process may have allocated an io port bitmap... nuke it. */
 	if (unlikely(NULL != tsk->thread.io_bitmap_ptr)) {
+		int cpu = get_cpu();
+		struct tss_struct *tss = init_tss + cpu;
 		kfree(tsk->thread.io_bitmap_ptr);
 		tsk->thread.io_bitmap_ptr = NULL;
+		tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
+		put_cpu();
 	}
 }
 

[-- Attachment #3: Type: text/plain, Size: 82 bytes --]


Scanned by evaluation version of Dr.Web antivirus Daemon 
http://drweb.ru/unix/