alloc_skb called nonatomically from interrupt
Hiya folks
I'm trying to get a feel of notifier_call_chain(), but with no luck.
This is basically what I've done.
On 2.4.21, I've added dev_sample() function which I've declared and
implemented in include/linux/netdevice.h and net/core/dev.c
respectively.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
int dev_sample(struct net_device *dev)
{
notifier_call_chain(&netdev_chain, NETDEV_SAMPLE, dev);
return 0;
}
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Of course, I've defined NETDEV_SAMPLE in include/linux/notifier.h
Now up to this stage, its fine. Problem is when I try to call
dev_sample() from driver/net/natsemi.c (my network device driver).
natsemi.c has check_link function which runs periodically and checks
to see if cable is out. So I've placed my dev_sample() in this
function and have it called whenever status of cable changes. But as
soon as the status change, machine dies with "alloc_skb called
nonatomically from interrupt c00ba700", with some printk's I was able
to find out notifier_call_chain() was getting called. But it happens
when it traverses the &netdev_chain. (at the very first one in fact)
I've tried wrapping the dev_sample() with rtnl_lock and unlock but
with no luck. It looks to me its to do with accessing resource at a
wrong time, but I have no idea where to go from here.
Any suggestion would be appreciated.
Cheers,
--
Daniel
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BUG : alloc_skb called nonatomically from interrupt
I am running Linux v2.4-test5 on MIPS (NEC DDB5476). I got the above run-time BUG report. See the call stack below. Can someone shed a light on this problem? Thanks. Jun -- reakpoint 2, alloc_skb (size=1531, gfp_mask=7) at skbuff.c:175 175 BUG(); (gdb) bt #0 alloc_skb (size=1531, gfp_mask=7) at skbuff.c:175 #1 0x8012ffc8 in sock_alloc_send_skb (sk=0x81179640, size=1531, fallback=0, noblock=60, errcode=0x811f3cd0) at sock.c:816 #2 0x80142308 in ip_build_xmit_slow (sk=0x81179640, getfrag=0x80158634 , frag=0x811f3d98, length=60, ipc=0x811f3d88, rt=0x811f71c0, flags=16448) at ip_output.c:555 #3 0x801427d4 in ip_build_xmit (sk=0x81179640, getfrag=0x80158634 , frag=0x811f3d98, length=4248, ipc=0x811f3d88, rt=0x811f71c0, flags=16448) at ip_output.c:687 #4 0x80158b88 in udp_sendmsg (sk=0x81179640, msg=0x811f3e50, len=4220) at udp.c:585 #5 0x8015f50c in inet_sendmsg (sock=0x801adf54, msg=0x811f3e50, size=4220, scm=0x3c) at af_inet.c:727 #6 0x8012d35c in sock_sendmsg (sock=0x8110a8b0, msg=0x811f3e50, size=4220) at socket.c:509 #7 0x8016dd1c in do_xprt_transmit (task=0x836a47c0) at xprt.c:215 #8 0x8016db6c in xprt_transmit (task=0x836a47c0) at xprt.c:1190 #9 0x8016b564 in call_transmit (task=0x836a47c0) at clnt.c:554 #10 0x8016f968 in __rpc_execute (task=0x836a47c0) at sched.c:574 #11 0x8016fde4 in __rpc_schedule () at sched.c:712 #12 0x801709d4 in rpciod (ptr=0x801adf54) at sched.c:1065 #13 0x8008c2f0 in kernel_thread (fn=0x80170810 , arg=0x801bb08c, flags=5) at process.c:158 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: alloc_skb called nonatomically from interrupt
On Sat, 23 Sep 2000, Jesper Juhl wrote: > Hello people, > > This is probably nothing important, but I thought I'd post it anyway in > case it's of use to somebody. Actually its important. > I just checked my syslog and noticed these strange messages: > > Aug 29 19:05:19 dustpuppy kernel: Unable to handle kernel paging request > at virtual address f006f004 > Aug 29 19:05:19 dustpuppy kernel: current->tss.cr3 = 03d34000, %cr3 = > 03d34000 > Aug 29 19:05:19 dustpuppy kernel: *pde = > Aug 29 19:05:19 dustpuppy kernel: current->tss.cr3 = 03d34000, %cr3 = > 03d34000 > Aug 29 19:05:19 dustpuppy kernel: *pde = 0000 > Aug 29 19:32:49 dustpuppy kernel: alloc_skb called nonatomically from > interrupt c0188061 > Aug 29 19:32:49 dustpuppy kernel: alloc_skb called nonatomically from > interrupt c016d60d > > I don't recall having any problems with my machine lately, so this > puzzels me. > > The kernel I was running at the time was 2.2.13 (unfortunately I don't > have that specific kernel anymore - upgraded to 2.2.17). > My hardware is a IBM Thinkpad 600 - 233Mhz Pentium MMX with 64MB RAM. If you have this problem with 2.2.17, put your System.map available to download somewhere and mail this list again. Thanks for your report. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: alloc_skb called nonatomically from interrupt
> > This is probably nothing important, but I thought I'd post it anyway in > > case it's of use to somebody. > > it is important, but unless you are unable to provide a System.map from > exactly the kernel image you were running at that time, it is useless. > > -- > Live long and prosper > - Harald Welte / [EMAIL PROTECTED] I'm affraid I no longer have that specific System.map file - I'll save them in the future! - Jesper Juhl [EMAIL PROTECTED] (please CC on replies) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
alloc_skb called nonatomically from interrupt
Hello people, This is probably nothing important, but I thought I'd post it anyway in case it's of use to somebody. I just checked my syslog and noticed these strange messages: Aug 29 19:05:19 dustpuppy kernel: Unable to handle kernel paging request at virtual address f006f004 Aug 29 19:05:19 dustpuppy kernel: current->tss.cr3 = 03d34000, %cr3 = 03d34000 Aug 29 19:05:19 dustpuppy kernel: *pde = Aug 29 19:05:19 dustpuppy kernel: current->tss.cr3 = 03d34000, %cr3 = 03d34000 Aug 29 19:05:19 dustpuppy kernel: *pde = Aug 29 19:32:49 dustpuppy kernel: alloc_skb called nonatomically from interrupt c0188061 Aug 29 19:32:49 dustpuppy kernel: alloc_skb called nonatomically from interrupt c016d60d I don't recall having any problems with my machine lately, so this puzzels me. The kernel I was running at the time was 2.2.13 (unfortunately I don't have that specific kernel anymore - upgraded to 2.2.17). My hardware is a IBM Thinkpad 600 - 233Mhz Pentium MMX with 64MB RAM. I hope this is usefull to you guys! BTW: Please CC me any replies to this, as I'm not on the list. Best regards, Jesper Juhl [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
