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From: Arun Sharma <asharma@fb•com>
To: <netdev@vger•kernel.org>
Subject: route add default fails with ESRCH?
Date: Fri, 17 Feb 2012 17:39:36 -0800	[thread overview]
Message-ID: <4F3F0158.2020406@fb.com> (raw)


I've been trying to debug this strange problem with recent 3.2 kernels:

# boot to single user mode
# service network start
# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr <blah>
           inet addr:10.47.46.39  Bcast:10.47.46.255  Mask:255.255.255.0

<Link is up>
# strace route add default gw 10.47.46.1
ioctl(3, SIOCADDRT, 0x7fff1fd4db80)     = -1 ESRCH (No such process)

Couple of data points:

* This didn't happen with 2.6.3x kernels
* This doesn't happen on all machines. Only a small subset

I tried to debug using perf probe points:

# cmdline : /usr/bin/perf record -e 
probe:fib_get_table,probe:fib_new_table,probe:fib_table_insert route add 
default gw 10.47.46.1

            route  7800 [001]  4170.916261: fib_get_table: 
(ffffffff81406528 <- ffffffff814065a6) ret=ffff8802142605c0
            route  7800 [001]  4170.916265: fib_get_table: 
(ffffffff81406528 <- ffffffff814067d3) ret=ffff880212a36680
            route  7800 [001]  4170.916266: fib_new_table: 
(ffffffff814067b6 <- ffffffff81406f04) ret=ffff880212a36680
            route  7800 [001]  4170.916270: fib_get_table: 
(ffffffff81406528 <- ffffffff8140d7fa) ret=ffff8802142605c0
            route  7800 [001]  4170.916271: fib_get_table: 
(ffffffff81406528 <- ffffffff8140d7fa) ret=ffff880212a36680
            route  7800 [001]  4170.916272: fib_get_table: 
(ffffffff81406528 <- ffffffff8140d7fa) ret=0
            route  7800 [001]  4170.916273: fib_table_insert: 
(ffffffff8140a60f <- ffffffff81406f18) ret=fffffffd

Any ideas on why fib_table_insert() is failing with -ESRCH?

  -Arun

next             reply	other threads:[~2012-02-18  1:39 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-18  1:39 Arun Sharma [this message]
2012-02-22 19:28 ` route add default fails with ESRCH? Arun Sharma
2012-02-22 21:27   ` Julian Anastasov
2012-02-22 21:52     ` Arun Sharma
2012-02-22 23:03       ` Arun Sharma
2012-02-22 23:56         ` David Miller
2012-02-23  1:26           ` Arun Sharma
2012-02-23  0:02       ` Julian Anastasov

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