lkml.org 
[lkml]   [2003]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] qdisc oops fix
    Hi!

    > This is a different problem from previous one posted.
    Same oops in slab.c:1128. Why do you think is different.

    > Theres a small window (exposed given that you are provisioning a lot
    > of qdiscs and running traffic at the same time) that an incoming packet
    > interupt will cause the BUG().
    >
    > GFP_ATOMIC will fix it, but i wonder if it appropriate.
    >
    > Alexey or Manfred?
    >
    > cheers,
    > jamal
    >
    > PS:- 15mbits is not a lot of traffic ;->
    Yes, I know. I was comparing 15mbit with almost no traffic on the machine
    running same qdiscs/filters/classes... :)

    >
    > On Wed, 16 Apr 2003, Catalin BOIE wrote:
    >
    > > > - sch = kmalloc(size, GFP_KERNEL);
    > > > + sch = kmalloc(size, GFP_ATOMIC);
    > > >
    > > > mysteriously fixes the problem? Could the problem be elsewhere?
    > > > Can you repost what the issue was? I am not on lk and i just saw the
    > > > posting on a web page.
    > >
    > > With many rules (~5000 classes and ~3500 qdiscs and ~50000 filters)
    > > the kernel oopses in slab.c:1128.
    > > It happens on high rates (~15mbit).
    > > On low rates, doesn't.
    > >
    > > Seems that an interrupt come and broke the memory allocation.
    > >
    > >
    > > >>EIP; c0127ab4 <kmem_cache_grow+44/1d8> <=====
    > >
    > > >>EAX; ffffffff <END_OF_CODE+3fd31247/????>
    > > >>EBX; c12c52c0 <END_OF_CODE+ff6508/????>
    > > >>EDI; c12c52c0 <END_OF_CODE+ff6508/????>
    > > >>ESP; ceab1c60 <END_OF_CODE+e7e2ea8/????>
    > >
    > > Trace; c0127e0f <kmalloc+eb/110>
    > > Trace; c01d3cac <qdisc_create_dflt+20/bc>
    > > Trace; d081ecc7 <END_OF_CODE+1054ff0f/????>
    > > Trace; c01d5265 <tc_ctl_tclass+1cd/214>
    > > Trace; d0820600 <END_OF_CODE+10551848/????>
    > > Trace; c01d27e4 <rtnetlink_rcv+298/3bc>
    > > Trace; c01d0605 <__neigh_event_send+89/1b4>
    > > Trace; c01d7cd4 <netlink_data_ready+1c/60>
    > > Trace; c01d7730 <netlink_unicast+230/278>
    > > Trace; c01d7b73 <netlink_sendmsg+1fb/20c>
    > > Trace; c01c79d5 <sock_sendmsg+69/88>
    > > Trace; c01c8b48 <sys_sendmsg+18c/1e8>
    > > Trace; c0120010 <map_user_kiobuf+8/f8>
    > >
    > >
    >

    ---
    Catalin(ux) BOIE
    catab@deuroconsult.ro
    -
    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/

    \
     
     \ /
      Last update: 2005-03-22 13:34    [W:0.026 / U:89.616 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site