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From: "Steve Schmidtke" <steve_schmidtke@hotmail.com>
To: petschge@gmx.de
Cc: User-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] Problem with 2.4.22-um4
Date: Wed, 17 Sep 2003 15:08:49 +0000	[thread overview]
Message-ID: <BAY7-F103PPYPeOqp2N00015916@hotmail.com> (raw)

petschge@gmx.de wrote:

>Checking that host ptys support output SIGIO...<0>Kernel panic: check_sigio 
>: read failed, err = -1
>
>In idle task - not syncing
>
>The host kernel is a 2.4.18 kernel patched by SuSE _without_ skas support. 
>gcc version is 2.95.3.
>
>Is this a know bug?

Jeff didn't like a part of my patch, but didn't back out all of the related 
bits.  I've sent him a patch that should fix this issue, but havn't heard 
back if he likes it any better.

In the mean time you can hand apply this diff to 
arch/um/kernel/sigio_user.c:tty_output()

-       else if(n == -EAGAIN) printk("No, enabling workaround\n");
-       else panic("check_sigio : read failed, err = %d\n", n);
+       else if(errno == EAGAIN) printk("No, enabling workaround\n");
+       else panic("check_sigio : read failed, errno = %d\n", errno);

Steve Schmidtke

>Is 2.4.22-um4 unusable without skas? Is this related to the patch in 
>arch/um/drivers/ubd_user.c? (Neither the patch from Ross Combs nor the 
>patch named ubd_start_io_thread.diff from Steve Schmidtke fix this error)
>
>mfg,
>Patrick "Petschge" Kilian

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             reply	other threads:[~2003-09-17 15:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-09-17 15:08 Steve Schmidtke [this message]
2003-09-17 22:20 ` [uml-devel] Problem with 2.4.22-um4 Jeff Dike
2003-09-18 12:14   ` Patrick "Petschge" Kilian
  -- strict thread matches above, loose matches on Subject: below --
2003-09-17 10:52 Patrick Kilian

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