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author | David S. Miller <davem@davemloft.net> | 2010-08-25 02:27:49 -0700 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-09-26 17:21:17 -0700 |
commit | a89d316f2bdf5df8f9a109d32f0e7b0940041e7f (patch) | |
tree | 5b6e3a0c5b305d0c7cd8654b4df2b638ce94a300 /arch/m68k/include/asm/mcfwdebug.h | |
parent | ebde7b9827da782d1fd0a51cdbac81b589552494 (diff) |
tcp: Combat per-cpu skew in orphan tests.
[ Upstream commit ad1af0fedba14f82b240a03fe20eb9b2fdbd0357 ]
As reported by Anton Blanchard when we use
percpu_counter_read_positive() to make our orphan socket limit checks,
the check can be off by up to num_cpus_online() * batch (which is 32
by default) which on a 128 cpu machine can be as large as the default
orphan limit itself.
Fix this by doing the full expensive sum check if the optimized check
triggers.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/m68k/include/asm/mcfwdebug.h')
0 files changed, 0 insertions, 0 deletions