The other day I was running the stock fedora kernel on my ip
forwarding setup, to see what the performance was, and the performance
wasn't very good.
system is S5520HC dual socket 2.93GHz Xeon 5570 (Nehalem) with 3 quad
port 82580 adapters (12 ports). Traffic is bidirectional 64 byte
packets being forwarded and received on each port, basically port to
port routing. I am only using 12 flows currently.
The driver is igb, and I am using an affinity script that lines up
each pair of ports that are forwarding traffic into optimal
configurations for cache locality. I am also disabling
remote_node_defrag_ratio to stop cross node traffic.
With the fedora default kernel from F14 it appears that
CONFIG_NETFILTER=y means that I cannot unload all of netfilter even if
I stop iptables service.
perf showed netfilter being prominent, and removing it gives me much
higher throughput. Is there a reason CONFIG_NETFILTER=y ? Isn't it a
good thing to be able to disable netfilter if you want to?
This patchset fixes several problems related with hw scanning
on 3945 (see patch 3 for details). It is intended to 2.6.38,
on older kernels software scanning does not work. All patches
are currently in Linus' tree.
What's the difference between building custom kernel with Fedora and
building a kernel with the sources from kernel.org? Building with rpmbuild
takes way longer to build than the normal source code from kernel.org which
is wierd. I've set it to build with rpmbuild for about 3h ago and it's still
building taking about 90% ~ 100% of both cores.
On Thu, Apr 07, 2011 at 11:59:41AM +0000, Hans de Goede wrote:
> commit 042ba03b683a8705f44d86b5283cb84de54d4970
> Author: Hans de Goede <hdegoede(a)redhat.com>
> Date: Thu Apr 7 14:01:43 2011 +0200
> Add a no lvds quirk for the Asus EB1007 to the i915 drm driver,
> this fixes gnome-shell not working on it
Just curious, have you submitted it upstream? I don't see it on
intel-gfx@ or linux-kernel@.
I have an external 4-disk enclosure, connected through USB 2.0 (my
laptop does not have a USB 3.0 connector, and the eSATA connector
somehow does not work); it initially had a 2-disk btrfs soft-RAID1 file
system (both data and metadata are RAID1).
I recently added two more disks and did a rebalance. To my surprise it
went past the point where all four disks have the same amount of disk
usage, and went all the way to the original disks being empty, and the
new disks having all the data!
Label: 'media.store' uuid: 4cfd3551-aa85-4399-b872-9238ddb14c97
Total devices 4 FS bytes used 1.22TB
devid 3 size 1.82TB used 1.24TB path /dev/sdb
devid 4 size 1.82TB used 1.24TB path /dev/sdc
devid 2 size 1.82TB used 8.00MB path /dev/sde
devid 1 size 1.82TB used 12.00MB path /dev/sdd
Is this to be expected? Would another rebalance fix it, or should I
force-stop it by shutting down when the disk usage is roughly balanced?
This is on Fedora 15 pre-release, x86_64, fully updated, kernel
188.8.131.52-9 and btrfs-progs 0.19-13
Michel Alexandre Salim
GPG key ID: 78884778
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Generally had no issues with this kernel except for this one:
I notice when I logout there are dropped random "bites" of little sets
of pixels which appear .. perhaps 10-30 of them .. these are small black
squares against the blue background.
Nouveau driver (on f14 fully updated).
I see that there is a patch in the -11 kernel on koji - I'll try that
and see if it goes away.