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| author |   Arnd Bergmann <arnd@arndb.de> | 2010-02-18 05:45:36 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-02-18 14:08:37 -0800 |
| commit | 02df55d28c6001a3cdb7a997a34a0b01f01d015e (patch) | |
| tree | ea1bf32f7464294ce90e288bf5440323e9ca6e7f /kernel | |
| parent | netfilter: nf_defrag_ipv4: fix compilation error with NF_CONNTRACK=n (diff) | |
| download | linux-dev-02df55d28c6001a3cdb7a997a34a0b01f01d015e.tar.xz linux-dev-02df55d28c6001a3cdb7a997a34a0b01f01d015e.zip | |
macvtap: rework object lifetime rules
This reworks the change done by the previous patch
in a more complete way.
The original macvtap code has a number of problems
resulting from the use of RCU for protecting the
access to struct macvtap_queue from open files.
This includes
- need for GFP_ATOMIC allocations for skbs
- potential deadlocks when copy_*_user sleeps
- inability to work with vhost-net
Changing the lifetime of macvtap_queue to always
depend on the open file solves all these. The
RCU reference simply moves one step down to
the reference on the macvlan_dev, which we
only need for nonblocking operations.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions