Re: port-sun2/45931: early kmem panic on sun2

[Lars Heidieker <lars%heidieker.de@localhost>]

The following reply was made to PR port-sun2/45931; it has been noted by GNATS.

From: Lars Heidieker <lars%heidieker.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>, 
 port-sun2-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, 
 netbsd-bugs%netbsd.org@localhost
Subject: Re: port-sun2/45931: early kmem panic on sun2
Date: Sun, 12 Aug 2012 15:07:22 +0200

 On 08/11/2012 06:25 PM, Izumi Tsutsui wrote:
 > The following reply was made to PR port-sun2/45931; it has been 
 > noted by GNATS.
 > 
 > From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost> To: 
 > para%NetBSD.org@localhost 
 > Cc: gnats-bugs%NetBSD.org@localhost, tsutsui%ceres.dti.ne.jp@localhost 
 > Subject: Re: 
 > port-sun2/45931: early kmem panic on sun2 Date: Sun, 12 Aug 2012 
 > 01:23:00 +0900
 > 
 >> NetBSD 5.99.64 (GENERIC) #0: Sun Feb  5 22:46:00 JST 2012 
 >> tsutsui@mirage:/s/src/sys/arch/sun2/compile/obj.sun2/GENERIC 
 >> Model: sun2 {120,170} fpu: no math support total memory = 7168 KB
 >> avail memory = 4912 KB panic: pool_get: kmem-4096: page empty 
 >> Stopped in pid 0.1 (system) at  netbsd:cpu_Debugger+0x6: unlk
 >> a6
 > 
 > This still happens on netbsd-6, but HEAD sun2 kernels works.
 > 
 > Pulling sys/kern/subr_kmem.c rev 1.46: 
 > http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/kern/subr_kmem.c#rev1.46
 >
 >
 > 
 > 
 > Does it also include some implicit bug fixes, not only
 > improvements for >4KB allocations? Or "decrease overall memory" is
 > mandatory for poor tier II ports?
 > 
 > 
 
 sun2 has a PAGE_SIZE of 2k which was not properly handled before this
 change. A 4k pool was initialized before but did not work, this is
 true for all archs with PAGE_SIZE < 4kb.
 This is fixed with rev 1.46.
 I think rev 1.46 should be pulled to netbsd-6.
 
 Thanks for trying this out.
 
 Lars