On Wed, 6 Jun 2007, Randy Dunlap wrote:
On Wed, 6 Jun 2007 15:28:43 -0700 Jesse Barnes wrote:
On Wednesday, June 6, 2007 3:26 pm Justin Piszcz wrote:
Nope, I booted with only netconsole= options. I have a lot of HW in
the box and I guess the buffer is too small. Not sure where to
change it in the kernel. Looking..
It's called "kernel log buffer size" and it's in "General setup".
or you can just boot with "log_buf_len=256k" on the kernel boot line (e.g.)
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
Thanks, very useful note!
$ stress --vm 32 --vm-bytes 250M
stress: info: [4087] dispatching hogs: 0 cpu, 0 io, 32 vm, 0 hdd
Mem: 8039576k total, 5288036k used, 2751540k free, 12k buffers
Swap: 0k total, 0k used, 0k free, 37944k cached
$ stress --vm 40 --vm-bytes 250M
stress: info: [4120] dispatching hogs: 0 cpu, 0 io, 40 vm, 0 hdd
Mem: 8039576k total, 6661484k used, 1378092k free, 12k buffers
Swap: 0k total, 0k used, 0k free, 38000k cached
$ stress --vm 42 --vm-bytes 250M
stress: info: [4398] dispatching hogs: 0 cpu, 0 io, 42 vm, 0 hdd
Mem: 8039576k total, 6447048k used, 1592528k free, 8k buffers
Swap: 0k total, 0k used, 0k free, 11148k cached
$ stress --vm 45 --vm-bytes 250M
stress: info: [4352] dispatching hogs: 0 cpu, 0 io, 45 vm, 0 hdd
stress: FAIL: [4372] (494) hogvm malloc failed: Cannot allocate memory
stress: FAIL: [4352] (395) <-- worker 4372 returned error 1
stress: WARN: [4352] (397) now reaping child worker processes
stress: FAIL: [4352] (452) failed run completed in 4s
$ stress --vm 48 --vm-bytes 250M
stress: info: [4303] dispatching hogs: 0 cpu, 0 io, 48 vm, 0 hdd
stress: FAIL: [4323] (494) hogvm malloc failed: Cannot allocate memory
stress: FAIL: [4322] (494) hogvm malloc failed: Cannot allocate memory
stress: FAIL: [4303] (395) <-- worker 4323 returned error 1
stress: WARN: [4303] (397) now reaping child worker processes
stress: FAIL: [4303] (395) <-- worker 4322 returned error 1
stress: WARN: [4303] (397) now reaping child worker processes
stress: FAIL: [4303] (452) failed run completed in 4s
Is there a better way to verify I can use all the available memory?
Justin.
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