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| author | Paolo Abeni <pabeni@redhat.com> | 2018-06-08 11:35:40 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-26 07:53:55 +0800 |
| commit | 5ecb7acce907f5418ff4de561d9875ba0a2d2dd9 (patch) | |
| tree | 3ffa411ea8f549cbfe1b7e721e529a2614f1f8a9 /tools/perf/scripts/python/stackcollapse.py | |
| parent | abaa1bb5e3652593a22a51e289bf9dfd4d4a8542 (diff) | |
udp: fix rx queue len reported by diag and proc interface
[ Upstream commit 6c206b20092a3623184cff9470dba75d21507874 ]
After commit 6b229cf77d68 ("udp: add batching to udp_rmem_release()")
the sk_rmem_alloc field does not measure exactly anymore the
receive queue length, because we batch the rmem release. The issue
is really apparent only after commit 0d4a6608f68c ("udp: do rmem bulk
free even if the rx sk queue is empty"): the user space can easily
check for an empty socket with not-0 queue length reported by the 'ss'
tool or the procfs interface.
We need to use a custom UDP helper to report the correct queue length,
taking into account the forward allocation deficit.
Reported-by: trevor.francis@46labs.com
Fixes: 6b229cf77d68 ("UDP: add batching to udp_rmem_release()")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions