Re: [PATCH] vlan & net drivers: avoid a 4-order allocation

From: Stephen Hemminger <shemminger@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Feb 2007 14:20:13 -0800

On Wed, 28 Feb 2007 14:41:57 +0200
Dan Aloni <da-x@xxxxxxxxxxxxx> wrote:

Hello,

This patch splits the vlan_group struct into a multi-allocated struct. On
x86_64, the size of the original struct is a little more than 32KB, causing
a 4-order allocation, which is prune to problems caused by buddy-system
external fragmentation conditions.

I couldn't just use vmalloc() because vfree() cannot be called in the
softirq context of the RCU callback.

Signed-off-by: Dan Aloni <da-x@xxxxxxxxxxxxx>

Please submit patch to proper place: netdev@xxxxxxxxxxxxxxx
and Ben Greear <greearb@xxxxxxxxxxxxxxx>

--
Stephen Hemminger <shemminger@xxxxxxxxxxxxxxxxxxxx>
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References:
- [PATCH] vlan & net drivers: avoid a 4-order allocation
  - From: Dan Aloni

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