[lc-devel] My first real test and my first real problem :-(

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Hi all,
yesterday I run a script very similar at this:

#/bin/bash
cmd=${0##*/}
kern=$(uname -r)
log=${cmd}-${kern}.log
echo $log

date >$log
echo >>$log 

for i in `seq 20 20 400`;
do echo 'memory ' $i >>$log; 
time ./fillmem $i; 
cat /proc/comp_cache_stat >>$log; 
done 2>>$log

The difference are only related to the output.

No problem with a stock 2.4.17,
here it goes the result:

memory  20
0.15user 0.11system 0:00.27elapsed 95%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+10275minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  40
0.49user 0.39system 0:00.87elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+20535minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  60
0.69user 0.68system 0:01.37elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+30795minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  80
0.68user 0.52system 0:01.20elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+41055minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  100
1.24user 1.13system 0:02.36elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+51315minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  120
0.78user 1.32system 0:02.11elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+61575minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  140
1.63user 1.58system 0:03.20elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+71835minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  160
1.47user 1.45system 0:02.92elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+82095minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  180
2.05user 2.15system 0:04.20elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+92355minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  200
2.20user 2.42system 0:04.61elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+102615minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  220
2.53user 2.49system 0:05.01elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (95major+112875minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  240
1.78user 2.95system 0:07.71elapsed 61%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (403major+130065minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  260
2.18user 2.90system 0:12.80elapsed 39%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (841major+146818minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  280
2.66user 3.25system 0:18.66elapsed 31%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (1337major+165312minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  300
2.45user 3.40system 0:24.72elapsed 23%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (2008major+183771minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  320
2.47user 4.37system 0:31.51elapsed 21%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (2653major+204072minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  340
2.12user 4.17system 0:38.78elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (3359major+224703minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  360
2.94user 5.11system 0:45.81elapsed 17%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (3970major+244526minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  380
2.89user 5.28system 0:51.39elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (4572major+264104minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory
memory  400
3.46user 5.53system 0:58.58elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (5267major+283273minor)pagefaults 0swaps
cat: /proc/comp_cache_stat: No such file or directory

Then I applied the patch 0.21 (with 128MiB and 16MiB)
With a simple ./fillmem 400
malloc/memset 001/240
malloc/memset 002/240
malloc/memset 003/240
malloc/memset 004/240
malloc/memset 005/240
malloc/memset 006/240
malloc/memset 007/240
[snip]
malloc/memset 185/240
malloc/memset 186/240
mall
lines 1-24 <1>Unable to handle kernel paging request at virtual address
0d77e2ff printing eip:
c0130060
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c0130060>]    Not tainted
EFLAGS: 00010206
eax: 0d77e2ff   ebx: 1e1a2d95   ecx: 00001000   edx: c02cca94
esi: 0d77e2ff   edi: 0000003f   ebp: 000000ff   esp: ce8bfd6c
ds: 0018   es: 0018   ss: 0018
Process fillmem (pid: 1092, stackpage=ce8bf000)
Stack: c02c9da0 c0271080 00000005 00000000 00001068 00000000 00001000
1e1a2d95
       ceefe000 00000020 c13bbf80 c012eff0 c13bbf80 00001000 ce8bfdac
ce8be000
              00000000 00000001 00000000 ce8bfe30 20000001 00001068 0000b9de
c011c226
       Call Trace: [<c012eff0>] [<c011c226>] [<c012a2dc>] [<c012a532>]
[<c012a59c>]
          [<c012ae43>] [<c012b0ab>] [<c01223a4>] [<c0121e69>] [<c0122516>]
[<c011245a>]
      [<c010b4fd>] [<c0112fa1>] [<c01122d0>] [<c0106fec>]

      Code: 8b 06 85 c0 75 1a 66 81 7e 06 00 10 0f 84 9f 00 00 00 0f 0b

Please find attached the output of my script with 128MiB and 16MiB of
compressed cache,
as you can see there is something that is not working.

I had also a freez (non ALT+SYS RQ) under X.

do you have any suggestions?

In any case, I was not able to use correctly my machine under X,
segmentation faul using
 a lot of program.