Re: [PATCH] support for Cobalt Networks (x86 only) systems (forrealthis

From: Jeff Garzik (jgarzik@mandrakesoft.com)
Date: Fri Jun 01 2001 - 09:15:37 EDT

  • Next message: Przemyslaw Wegrzyn: "2.2.19 SMP - timing problems"

    Bogdan Costescu wrote:
    > No way! If I implement a HA application which depends on link status, I
    > want the info to be accurate, I don't want to know that 30 seconds ago I
    > had good link.

    To tangent a little bit, and add netdev to the CC...

    The loss and regain of link status should be proactively signalled to
    userspace using netlink or something similar. Currently we have
    netif_carrier_{on,off,ok} but it is only passively checked.
    netif_carrier_{on,off} should probably schedule_task() to fire off a
    netlink message...

    For your HA application specifically, right now, I would suggest making
    sure your net driver calls netif_carrier_xxx correctly, then checking
    for IFF_RUNNING interface flag. IFF_RUNNING will disappear if the
    interface is up, but there is no carrier [as according to
    netif_carrier_ok]. 

    -- 
Jeff Garzik      | Disbelief, that's why you fail.
Building 1024    |
MandrakeSoft     |
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

    This archive was generated by hypermail 2b29 : Fri Jun 01 2001 - 09:19:40 EDT