John Baldwin wrote:
On Friday 02 March 2007 13:45, Scott Long wrote:
John Baldwin wrote:
On Friday 02 March 2007 12:28, Kris Kennaway wrote:
On Fri, Mar 02, 2007 at 10:13:54AM -0700, Scott Long wrote:
John Baldwin wrote:
jhb 2007-03-02 17:01:45 UTC
FreeBSD src repository
Modified files:
sys/kern kern_intr.c
Log:
- Don't do the interrupt storm protection stuff for software interrupt
handlers.
- Use pause() when throtting during an interrupt storm.
Reported by: kris (1)
Revision Changes Path
1.142 +3 -2 src/sys/kern/kern_intr.c
Actually, having this helped detect a problem with a CAM driver.
Scott
I saw it under normal operation when doing a lot of loopback traffic
on an 8-core.
Also, if it ever kicked in for softclock, the system would deadlock.
Can it be selectively enabled?
We could do that, sure. The original intent was to prevent a storming
level-triggered PCI interrupt to hang the machine though. It was never
really intended for swi's and having it be on for swi's was an oversight on
my part.
It could be argued that "storming" on the swi is also a bug. It
certainly was for a misbehaving driver recently.
Scott
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