Re: [Fedora-xen] [Xen-devel] Re: [Xen-users] Continuing BUG:-iness booting Fedora Rawhide 3.1.0-rc's (was Summary: Experiences setting up a debug serial port)

[jim burns <jim_burn@xxxxxxxxxxxxx>]

On Fri September 16 2011, 6:42:32 PM, jim burns wrote:
> On Fri September 16 2011, 4:06:30 PM, jim burns wrote:
> > OK, if your confident that these problems will go away in a production
> > kernel,  especially the GPF error, I can wait. If you don't need
> > anything
> > else, I'll bring down the system, and retreat to 2.6.40 in a couple of
> > hours. Thanx for you attention.
> 
> Sorry, I take it back. Just rebooted back into 2.6.40, and I'm still getting
> GPF errors - just not very frequently.

Yayyy! Fedora rawhide just came out with 3.1.0-0.rc7.git0.2.fc17. It boots up 
without any BUG:s. I assume your ' Alter the locking to be a mutex.' patch 
made it into rc7. It starts my winxp domu, w/512 MB, reasonably fast, for a 
rawhide kernel. 'time xm create' reports:

xm create winxp  0.21s user 0.48s system 3% cpu 17.738 total

This is a far cry from the 3-6 min. under rc6.

When I up the memory to 768 MB, 'xm create' does not hang, like in rc6, but 
does take longer to complete:

xm create winxp  0.18s user 0.64s system 0% cpu 2:48.65 total

Also, tmem (I'm guessing) is cooperating with dom0's 'free' a lot better. 
Starting up rc7, before starting any guests:

jimb@insp6400 09/23/11 11:07AM:~
[503] > free
             total       used       free     shared    buffers     cached
Mem:       1797668    1702884      94784          0      82784     490104
-/+ buffers/cache:    1129996     667672
Swap:      4063228          0    4063228

After starting one 512 MB guest:

root@insp6400 09/23/11 11:23AM:~
[504] > free
             total       used       free     shared    buffers     cached
Mem:       1387244    1352212      35032          0      23660     178560
-/+ buffers/cache:    1149992     237252
Swap:      4063228        104    4063124

After stopping the 512 MB guest, and starting a 768 MB guest:

root@insp6400 09/23/11 11:38AM:~
[510] > free 
             total       used       free     shared    buffers     cached
Mem:       1073900    1058108      15792          0       2564      66488
-/+ buffers/cache:     989056      84844
Swap:      4063228     141368    3921860

However, on 3.1.0-0.rc6.git0.0.xendom0.fc17 (myoung's temp build), before any 
guests:

[506] > free
             total       used       free     shared    buffers     cached
Mem:       1495104    1407388      87716          0      14780     116976
-/+ buffers/cache:    1275632     219472
Swap:      4063228       8508    4054720

which is 300 MB less than rc7. After starting up a 512 MB guest:

root@insp6400 09/23/11  1:17PM:/boot/grub
[510] > free                                                                    
                                                                        
             total       used       free     shared    buffers     cached
Mem:       1084680    1000164      84516          0       2580      75724
-/+ buffers/cache:     921860     162820
Swap:      4063228     388032    3675196

which is still 300 MB less than rc7. In all cases, 'xm list' does report the 
correct amount of memory. I'm saying the cooperation with dom0's 'free' is 
better in rc7.

All in all, you're heading in the right direction. Thanx a lot.

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