Date: Wed, 29 Oct 2003 11:52:48 -0700 From: Sam Leffler <sam@errno.com> To: freebsd-current@freebsd.org Subject: HEADSUP: MPSAFE network drivers Message-ID: <200310291052.48617.sam@errno.com>
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I'm committing changes to mark various network drivers' interrupt handlers
MPSAFE. To insure folks have a way to backout if they hit problems I've also
added a tunable that lets you disable this w/o rebuilding your kernel. By
default all network drivers that register an interrupt handler INTR_MPSAFE
are setup to run their ISR w/o Giant. If you want to defeat this w/o
changing the code you can set
debug.mpsafenet=0
from the loader when booting and the MPSAFE bit will automatically be removed.
I plan to use this to also control forthcoming changes for registering MPSAFE
netisrs.
The following drivers are marked MPSAFE:
ath, em, ep, fxp, sn, wi, sis
I've got changes coming for bge. Other drivers probably can be marked MPSAFE
but I'm only doing it for those drivers that I can test.
Sam
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Content-Description: Sam Leffler <sam@FreeBSD.org>: cvs commit: src/sys/kern
subr_bus.c
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From: Sam Leffler <sam@FreeBSD.org>
Date: Wed, 29 Oct 2003 10:29:50 -0800 (PST)
To: src-committers@FreeBSD.org,
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Subject: cvs commit: src/sys/kern subr_bus.c
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sam 2003/10/29 10:29:50 PST
FreeBSD src repository
Modified files:
sys/kern subr_bus.c
Log:
Add a temporary mechanism to disble INTR_MPSAFE from network interface
drivers. This is prepatory to running more parts of the network system
w/o Giant.
Revision Changes Path
1.135 +13 -0 src/sys/kern/subr_bus.c
http://cvsweb.FreeBSD.org/src/sys/kern/subr_bus.c.diff?r1=1.134&r2=1.135
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