HEADSUP: MPSAFE network drivers

From: Sam Leffler (sam_at_errno.com)
Date: 10/29/03

  • Next message: John Angelmo: "Re: __fpclassifyd problem" 
    To: freebsd-current@freebsd.org
Date: Wed, 29 Oct 2003 11:52:48 -0700

    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

    attached mail follows:

    Date: Wed, 29 Oct 2003 10:29:50 -0800 (PST)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org

    attached mail follows:

      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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  • Next message: John Angelmo: "Re: __fpclassifyd problem"

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