On Tue, Dec 14, 2010 at 1:03 PM, Denise H. G. <darcsis@gmail.com> wrote:
quoted text
> On 2010/12/14 at 02:45, Jeff Ross <jross@openvistas.net> wrote:
>>
>> On 12/13/10 09:52, Nick Jones wrote:
>>> On Mon, 13 Dec 2010 at 22:55:59 +0800, Denise H. G. wrote:
>>>>> FWIW, I'm running -current with BIGMEM enabled on my X200 and it's
>>>>> running fine. B I've attached the output of dmesg and pcidump -v for
>>>>> reference.
>>>>>
>>>>> Kernel is generic otherwise, just renamed.
>>>>>
>>>>
>>>> Great! Did you recompile your kernel? Or just modified your kernel by
>>>> using config(8) ? I am rather new to OpenBSD...
>>>
>>> You need to amend:
>>>
>>> /usr/src/sys/arch/amd64/amd64/machdep.c
>>>
>>> And change the relevant line (1183 in the -current source I checked out
>>> yesterday) so that it says:
>>>
>>> int bigmem = 1;
>>>
>>> Then recompile your kernel as per the FAQ, reboot, and cross your
fingers.
quoted text
>>> Report your success (or failure) here.
>>>
>>
>> Be aware that you are treading on unproven and unsupported ground, and
>> the devs are not interested in hearing about bigmem related problems.
>>
>> Here is a PR I submitted not to long ago that was immediately closed
>> because it was based on a bigmem kernel:
>>
>> http://cvs.openbsd.org/cgi-bin/query-pr-wrapper?full=yes&numbers=6453
>
> Thanks.
>
> I've switched to FreeBSD for my desktop with 4G memory...

Unnecessary fear :

$ sysctl kern.version
kern.version=OpenBSD 4.8-current (GENERIC.MP) #547: Tue Dec  7 23:16:34 MST
2010
    deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP

$

load averages:  0.76,  1.14,  1.06


                                 hostname 13:27:52
49 processes:  1 running, 45 idle, 1 zombie, 2 on processor
CPU0 states:  2.0% user,  0.0% nice,  1.6% system,  0.0% interrupt, 96.4%
idle
CPU1 states:  3.8% user,  0.0% nice,  1.2% system,  0.0% interrupt, 95.0%
idle
Memory: Real: 321M/610M act/tot  Free: 2651M  Swap: 0K/8189M used/tot

$ dmesg | grep mem
RTC BIOS diagnostic error 11<memory_size>
real mem  = 3487125504 (3325MB)
avail mem = 3420016640 (3261MB)
spdmem0 at iic0 addr 0x50: 2GB DDR3 SDRAM PC3-10600
spdmem1 at iic0 addr 0x52: 2GB DDR3 SDRAM PC3-10600
kqemu: kqemu version 0x00010300 loaded, max locked mem=1702696kB
$

My computer is more then 90% of time idle (regarding CPU) and my memory
(even with bufcachepercent=40) is all the time more then 400MB free even that
I'm using a LOT of apps at same time including two or three VM's in Qemu.


$ vmstat 1 10
 procs    memory       page                    disks    traps          cpu
 r b w    avm     fre  flt  re  pi  po  fr  sr sd0 cd0  int   sys   cs us sy
id
 1 0 0 329432 2714044  762   0   0   0   0   0   6   0   47 14706  775  8  3
89
 1 0 0 329544 2713900   67   0   0   0   0   0   0   0   35  3206  455  3  0
97
 1 0 0 329544 2713900   23   0   0   0   0   0   0   0   10  2412  319  0  0
100
 1 0 0 329544 2713900   33   0   0   0   0   0   0   0    3  2386  305  0  0
100
 1 0 0 329464 2713980  527   0   0   0   0   0   0   0    4  2568  313  6  0
94
 2 0 0 329464 2713980   58   0   0   0   0   0   0   0    3  2562  327  1  0
99
 0 0 0 329464 2713980   23   0   0   0   0   0   0   0   47  2907  404  1  0
99
 1 0 0 329452 2713992   30   0   0   0   0   0   0   0   58  4672  451  2  0
98
 1 0 0 329636 2713808 1021   0   0   0   0   0   0   0   69  7632  465  5  4
91
 1 0 0 329644 2713800  523   0   0   0   0   0   0   0    3  2504  308  5  0
95
$


I am
quoted text
> considering giving it a try on my laptop with less memory...
>
>>
>> At the bottom of this lengthy bug report is the response of the dev
>> who closed it.
>>
>> Jeff Ross
>>
>>
>>
>
>
>
> --
> If reproducibility may be a problem conduct the
> test only once.