Re: port-amd64/39283: Kernel crash on Dell Poweredge 2950

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

The following reply was made to PR port-amd64/39283; it has been noted by GNATS.

From: Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>
To: Tobias Nygren <tnn%NetBSD.org@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, gnats-admin%netbsd.org@localhost, 
netbsd-bugs%netbsd.org@localhost,
 fredrik%netbsd.se@localhost
Subject: Re: port-amd64/39283: Kernel crash on Dell Poweredge 2950
Date: Mon, 14 Dec 2009 21:02:46 +0000

 Tobias Nygren <tnn%NetBSD.org@localhost> wrote:
 >  With some local patches I've been able to reduce the panics to a
 >  deadlock waiting for kva that never becomes availabe. It looks like
 >  the underlying problem is in fact a resource leak.
 
 Cool.  Although before fixing this, it would be good to fix locking issues
 in KVA reclamation.
 
 >  POOL CACHE ksiginfo: size 72, align 8, ioff 0, roflags 0x00000040
 >          alloc 0xffffffff80d42f20
 >          minitems 0, minpages 0, maxpages 4294967295, npages 264334
 >          itemsperpage 56, nitems 21, nout 14802683, hardlimit 4294967295
 >          nget 14809537, nfail 13, nput 6854
 >          npagealloc 264337, npagefree 3, hiwat 264334, nidle 0
 >          cpu layer hits 5450561 misses 14853292
 >          cache layer hits 43741 misses 14809551
 >          cache layer entry uncontended 14853283 contended 9
 >          cache layer empty groups 0 full groups 0
 >  
 >  Are we aware of any issues related to ksiginfo leakage in 5.0/current?
 
 In conversation with ad@ some time ago, he mentioned some possible ksiginfo
 leak.  I will check few code paths with ksiginfo_cache later..
 
 -- 
 Mindaugas