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    SubjectRe: 2.4.23 crash on Intel SDS2
    > > It's a database machine running MySQL and Postgres.  The
    > > MySQL server runs about 4 queries/sec and PostGres only as
    > > needed. It also does some minor mail service, say 2
    > > messages per minute and runs apache at about 10 requests
    > > per minute.
    > >
    > > > > There are no significant driver changes in -pre4 that could affect you.
    > > > >
    > > > > Can you please try with mem=900M? I suspect something in the VM changes
    > > > > might be causing this.
    > >
    > > Just tried with mem=900m and subsequently mem=850m so as no
    > > himem pages were available with no effect. Machine still
    > > crashed.

    Hi,

    Well, I tried backing out the vm changes from pre4, no
    luck so started disabling things. So far, it seems my
    firewall script is at fault. I looked through the
    pre3-pre4 diff and the only change to the nat code is a
    one-liner.

    # The following is the BitKeeper ChangeSet Log
    # --------------------------------------------
    # 03/09/04 laforge@netfilter.org 1.1063.41.4
    # [NETFILTER]: NAT range calculation fix.
    #
    # This patch fixes a logic bug in NAT range calculations, which also
    # causes a large slowdown when ICMP floods go through NAT.
    #
    # Author: Karlis Piesenieks
    # --------------------------------------------
    diff -Nru a/net/ipv4/netfilter/ip_nat_core.c b/net/ipv4/netfilter/ip_nat_core.c
    --- a/net/ipv4/netfilter/ip_nat_core.c Sun Nov 16 13:41:25 2003
    +++ b/net/ipv4/netfilter/ip_nat_core.c Sun Nov 16 13:41:25 2003
    @@ -157,8 +157,8 @@
    continue;
    }

    - if ((mr->range[i].flags & IP_NAT_RANGE_PROTO_SPECIFIED)
    - && proto->in_range(&newtuple, IP_NAT_MANIP_SRC,
    + if (!(mr->range[i].flags & IP_NAT_RANGE_PROTO_SPECIFIED)
    + || proto->in_range(&newtuple, IP_NAT_MANIP_SRC,
    &mr->range[i].min, &mr->range[i].max))
    return 1;
    }
    Reversing that change has thus far fixed things over here
    but time will tell. Is there any possible way that that
    particular change is somehow not smp safe?

    Shane
    -
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