Re: kern/44418 (FAST_IPSEC and if_wm kernel panic - may affect the whole network stack)

[Wolfgang Stukenbrock <Wolfgang.Stukenbrock%nagler-company.com@localhost>]

The following reply was made to PR kern/44418; it has been noted by GNATS.

From: Wolfgang Stukenbrock <Wolfgang.Stukenbrock%nagler-company.com@localhost>
To: M.Drochner%fz-juelich.de@localhost
Cc: Wolfgang Stukenbrock <Wolfgang.Stukenbrock%nagler-company.com@localhost>,
        gnats-bugs%NetBSD.org@localhost, kern-bug-people%NetBSD.org@localhost,
        netbsd-bugs%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
drochner%NetBSD.org@localhost
Subject: Re: kern/44418 (FAST_IPSEC and if_wm kernel panic - may affect the  
whole network stack)
Date: Mon, 14 Feb 2011 09:16:41 +0100

 I think it is.
 
 During testing I've got a panic when a CPU tries to get the mutex twice.
 And if the spl-level does not lock out network interrupts, this may 
 happen. Even it the whole is very small ...
 
 best regards
 
 W. Stukenbrock
 
 Matthias Drochner wrote:
 
 > Wolfgang.Stukenbrock%nagler-company.com@localhost said:
 > 
 >>When the softnet_lock is aquired, the spl-level should have been
 >>already  raised to splnet/splsoftnet!
 >>
 > 
 > I'm not sure this is a problem here because softnet_lock is
 > an adaptive mutex.
 > 
 > best regards
 > Matthias
 > 
 > 
 > 
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