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| author |   Eric Dumazet <eric.dumazet@gmail.com> | 2012-04-10 20:08:39 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-04-11 10:10:43 -0400 |
| commit | 87151b8689d890dfb495081f7be9b9e257f7a2df (patch) | |
| tree | cb12becc26090b9fd9275f25cee851ffb40d931f /tools/perf/scripts/python/syscall-counts.py | |
| parent | bridge: Do not send queries on multicast group leaves (diff) | |
| download | linux-dev-87151b8689d890dfb495081f7be9b9e257f7a2df.tar.xz linux-dev-87151b8689d890dfb495081f7be9b9e257f7a2df.zip | |
net: allow pskb_expand_head() to get maximum tailroom
Marc Merlin reported many order-1 allocations failures in TX path on its
wireless setup, that dont make any sense with MTU=1500 network, and non
SG capable hardware.
Turns out part of the problem comes from pskb_expand_head() not using
ksize() to get exact head size given by kmalloc(). Doing the same thing
than __alloc_skb() allows more tailroom in skb and can prevent future
reallocations.
As a bonus, struct skb_shared_info becomes cache line aligned.
Reported-by: Marc MERLIN <marc@merlins.org>
Tested-by: Marc MERLIN <marc@merlins.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions