kern/125181: [ndis] [patch] with wep enters kdb.enter.unknown, panics

Paul B. Mahol onemda at
Fri Jul 18 11:23:28 UTC 2008

On 7/17/08, Andrew Thompson <thompsa at> wrote:
> The following reply was made to PR kern/125181; it has been noted by GNATS.
> From: Andrew Thompson <thompsa at>
> To: Coleman Kane <cokane at>
> Cc: bug-followup at, onemda at
> Subject: Re: kern/125181: [ndis] [patch] with wep enters kdb.enter.unknown,
> 	panics
> Date: Thu, 17 Jul 2008 09:43:42 -0700
>  On Thu, Jul 17, 2008 at 12:09:52PM -0400, Coleman Kane wrote:
>  > Andrew,
>  >
>  > I got directed to this PR by onemda at (Paul D. Mahol), who's
>  > been helping me track down some edge cases in the if_ndis locking
>  > rewrite. I am not 100% familiar with the locking semantics in play here
>  > (IEEE80211 and VAPs), so I wanted to run it by you before I determine
>  > that it seems to be working well for me.
>  I dont think ndis should be reaching into the net80211 lock. Now that
>  ndis uses a regular mutex its a good chance to add mtx_asserts in the
>  right places and get the locking up to speed. I will try to post a patch
>  soon unless someone beats be to it.

Patch impact on performance is marginal if not completely irrelevant.
The only way to improve code in that file is rewritting offending functions.
And at end net80211 lock would be still there (called via some other function).

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