Re: [Xen-devel] Interrupt levels

[Nicholas Lee <nic-lists@xxxxxxxxxxxxxx>]

On Wed, Mar 09, 2005 at 09:38:44AM -0000, Ian Pratt wrote:
> Things do rather point at your fusion mpt scsi card driver. It's odd
> that it's the timer interrupt that counts fast rather than the
> associated device interrupt, but this could be because its always
> setting an 'add_timer' to go off in the very near future.

nic@stateless:/usr/src/xen/xen-2.0-testing.bk/linux-2.6.10-xen0/drivers/message/fusion$
 grep -rs add_time .
./mptbase.c:    add_timer(&pCfg->timer);
./mptbase.c:    add_timer(&pCfg->timer);
./mptctl.c:                                     add_timer(&ioc->ioctl->timer);
./mptctl.c:     add_timer(&ioctl->TMtimer);
./mptctl.c:     add_timer(&ioc->ioctl->timer);
./mptscsih.c:    * and add_timer
./mptscsih.c:   add_timer(&hd->TMtimer);
./mptscsih.c:   add_timer(&hd->timer);
./mptscsih.c:   add_timer(&hd->timer);


Which is likely to be the one to look at closer? Not being a kernel
expert myself.


What about XFS? Could that cause this issue?


I'll see if I can get out there tomorrow afternoon and try the text
based CD.

Testing has the same problem:

ERROR: cannot use unconfigured serial port COM1
 __  __            ____    ___
 \ \/ /___ _ __   |___ \  / _ \
  \  // _ \ '_ \    __) || | | |
  /  \  __/ | | |  / __/ | |_| |
 /_/\_\___|_| |_| |_____(_)___/

 http://www.cl.cam.ac.uk/netos/xen
 University of Cambridge Computer Laboratory

 Xen version 2.0 (nic@) (gcc version 3.3.5 (Debian 1:3.3.5-8)) Wed Mar  9 
21:00:54 NZDT 2005
 Latest ChangeSet: 2005/03/09 02:02:39 1.1768 422e593fP_MDJ47j5LhtS8fQOVuyAQ


nic@stateless:~$ vmstat 3
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
 0  0      0 215240    104  15328    0    0   179    36 150999   137  4  1 92  2
 0  0      0 215240    104  15328    0    0     0     0 202363    11  0  0 100  0
 0  0      0 215248    104  15328    0    0     0   239 205301    49  0  0 100  0
 0  0      0 215248    104  15328    0    0     0     0 202289     8  0  0 100  0
 0  0      0 215248    104  15328    0    0     0     6 202663    13  0  0 100  0
 0  0      0 215248    104  15328    0    0     0   163 204469    44  0  0 100  0
 0  0      0 215248    104  15328    0    0     0     0 205706     8  0  0 100  0

This is again a clean state, with no xend only the processes from the
previous 'ps awx' running.


MPT is in the kernel, but not mptctl.

Nicholas


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