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LKML Watch
- From: Satoshi Oshima <soshima at redhat dot com>
- To: systemtap at sources dot redhat dot com
- Date: Thu, 30 Mar 2006 10:28:54 -0500
- Subject: LKML Watch
I think the cases that systemtap might help to solve are below.
(1)
OOM kills if swappiness set to 0, swap storms otherwise
http://lkml.org/lkml/2006/3/27/250
I am simply trying to run a Gnome desktop (Gnome 2.14, Evolution,
Firefox, gtk-gnutella usually open) without swapping or getting OOM
killed.
I have to set the swappiness to 0 or else I get swap storms when simply
browsing the web and reading my mail. I think this is insane as I have
512MB of RAM. It seems as if the kernel will OOM kill firefox rather
than shrink the file cache!
(2)
dcache leak in 2.6.16-git8
http://lkml.org/lkml/2006/3/27/7
A 2GB x86-64 desktop system here is currently swapping itself to death after
a few days uptime.
Some investigation shows this:
inode_cache 1287 1337 568 7 1 : tunables 54 27 8 : slabdata 191 191 0
dentry_cache 1867436 1867643 208 19 1 : tunables 120 60 8 : slabdata 98297 98297 0
Going to reboot it now.
comment> One of the most difficult debug is slab related bug.
comment> I hope systemtap can help this type of bug.
(3)
KERNEL: assertion (!sk->sk_forward_alloc) failed at net/...
http://lkml.org/lkml/2006/3/29/4
Kernel logs assertions below.
----
Mar 27 16:16:45 king kernel: KERNEL: assertion (!sk->sk_forward_alloc) failed at net/core/stream.c (283)
Mar 27 16:16:45 king kernel: KERNEL: assertion (!sk->sk_forward_alloc) failed at net/ipv4/af_inet.c (150)
----
commnet> Systemtap will help to track down the root cause.
(4)
DTrace for Linux
http://lkml.org/lkml/2006/3/29/6
I am planning to port DTrace (Solaris 10) utility to Linux. I have
done good enough research for same. Is this port of DTrace to Linux
already been started/completed ?
Please let me know your comments on this.
comment> We should give more publicity. 8)
Satoshi