From: William Allen Simpson <william.allen.simpson@gmail.com>
To: netdev@vger.kernel.org
Subject: query: tcpdump versus atomic?
Date: Wed, 14 Oct 2009 00:23:07 -0400 [thread overview]
Message-ID: <4AD5522B.50101@gmail.com> (raw)
Anybody know what code path tcpdump changes to running atomic?
Is there a function to test whether you're running atomic?
Dutifully testing, and noticed a strange anomaly. When the code is
running normally, no problems. When running tcpdump on the client, no
problems. When running tcpdump on the server:
[ 88.997594] device eth0 entered promiscuous mode
[ 114.827403] BUG: scheduling while atomic: swapper/0/0x10000100
[ 114.827462] Modules linked in: lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer snd ppdev iTCO_wdt iTCO_vendor_support psmouse soundcore parport_pc intel_agp parport agpgart pcspkr serio_raw shpchp snd_page_alloc 8139too aic7xxx 8139cp
scsi_transport_spi mii floppy
[ 114.827493]
[ 114.827497] Pid: 0, comm: swapper Not tainted (2.6.32-rc3 #4) Imperial
[ 114.827501] EIP: 0060:[<c0123295>] EFLAGS: 00000246 CPU: 0
[ 114.827512] EIP is at native_safe_halt+0x5/0x10
[ 114.827515] EAX: c0740000 EBX: 00000000 ECX: ffff4b6e EDX: 00000000
[ 114.827519] ESI: c07992c0 EDI: c0743000 EBP: c0741fa0 ESP: c0741fa0
[ 114.827522] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 114.827525] CR0: 8005003b CR2: 09278fc4 CR3: 04b56000 CR4: 00000690
[ 114.827529] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 114.827532] DR6: ffff0ff0 DR7: 00000400
[ 114.827535] Call Trace:
[ 114.827546] [<c01098b5>] default_idle+0x65/0x90
[ 114.827550] [<c0102062>] cpu_idle+0x52/0x90
[ 114.827558] [<c056cc23>] rest_init+0x53/0x60
[ 114.827565] [<c079c93d>] start_kernel+0x328/0x390
[ 114.827569] [<c079c3ce>] ? unknown_bootoption+0x0/0x1f6
[ 114.827574] [<c079c07e>] i386_start_kernel+0x7e/0xa8
[ 136.570632] device eth0 left promiscuous mode
next reply other threads:[~2009-10-14 4:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-14 4:23 William Allen Simpson [this message]
2009-10-14 15:20 ` query: tcpdump versus atomic? William Allen Simpson
2009-10-14 15:59 ` Stephen Hemminger
2009-10-14 20:36 ` William Allen Simpson
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