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| author | Justin Iurman <justin.iurman@uliege.be> | 2024-12-03 13:49:45 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-21 14:01:38 +0100 |
| commit | 4a855c5aec41bf84922224ab7a74e088776e3ac4 (patch) | |
| tree | a02f3f6ca58837f43d86f0873b563be8f17e4cf1 /kernel | |
| parent | 2fcc9f3798ef82399564d247458e69abd10e683b (diff) | |
| download | linux-4a855c5aec41bf84922224ab7a74e088776e3ac4.tar.gz linux-4a855c5aec41bf84922224ab7a74e088776e3ac4.tar.bz2 linux-4a855c5aec41bf84922224ab7a74e088776e3ac4.zip | |
net: ipv6: rpl_iptunnel: mitigate 2-realloc issue
[ Upstream commit 985ec6f5e6235242191370628acb73d7a9f0c0ea ]
This patch mitigates the two-reallocations issue with rpl_iptunnel by
providing the dst_entry (in the cache) to the first call to
skb_cow_head(). As a result, the very first iteration would still
trigger two reallocations (i.e., empty cache), while next iterations
would only trigger a single reallocation.
Performance tests before/after applying this patch, which clearly shows
there is no impact (it even shows improvement):
- before: https://ibb.co/nQJhqwc
- after: https://ibb.co/4ZvW6wV
Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Cc: Alexander Aring <aahringo@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Stable-dep-of: 92191dd10730 ("net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions