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| author | Florian Westphal <fw@strlen.de> | 2017-08-09 20:41:49 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-09 16:57:38 -0700 |
| commit | 019a316992ee0d9832b1c480c899d6bdf2a0a77e (patch) | |
| tree | 3a97790600c4e1a23ffce2d9376252704a3ee5aa /tools/perf/scripts/python/bin | |
| parent | rtnetlink: make rtnl_register accept a flags parameter (diff) | |
| download | linux-019a316992ee0d9832b1c480c899d6bdf2a0a77e.tar.gz linux-019a316992ee0d9832b1c480c899d6bdf2a0a77e.zip | |
rtnetlink: add reference counting to prevent module unload while dump is in progress
I don't see what prevents rmmod (unregister_all is called) while a dump
is active.
Even if we'd add rtnl lock/unlock pair to unregister_all (as done here),
thats not enough either as rtnl_lock is released right before the dump
process starts.
So this adds a refcount:
* acquire rtnl mutex
* bump refcount
* release mutex
* start the dump
... and make unregister_all remove the callbacks (no new dumps possible)
and then wait until refcount is 0.
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions