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net: make default_rps_mask a per netns attribute

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That really was meant to be a per netns attribute from the beginning.

The idea is that once proper isolation is in place in the main
namespace, additional demux in the child namespaces will be redundant.
Let's make child netns default rps mask empty by default.

To avoid bloating the netns with a possibly large cpumask, allocate
it on-demand during the first write operation.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni
2023-02-17 13:28:49 +01:00
committed by David S. Miller
parent e469b6268d
commit 50bcfe8df7
4 changed files with 59 additions and 21 deletions
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include/linux/netdevice.h
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@@ -224,7 +224,6 @@ struct net_device_core_stats {
#include <linux/static_key.h>
extern struct static_key_false rps_needed;
extern struct static_key_false rfs_needed;
extern struct cpumask rps_default_mask;
#endif
struct neighbour;