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| author | Justin Iurman <justin.iurman@uliege.be> | 2024-12-03 13:49:44 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-21 14:01:38 +0100 |
| commit | 2fcc9f3798ef82399564d247458e69abd10e683b (patch) | |
| tree | 724ba9929a42a3f9599a9079d5827fc97ea8af4e /kernel | |
| parent | 8471e228448a818e4c27cab4b681b2e758e46cf5 (diff) | |
| download | linux-2fcc9f3798ef82399564d247458e69abd10e683b.tar.gz linux-2fcc9f3798ef82399564d247458e69abd10e683b.tar.bz2 linux-2fcc9f3798ef82399564d247458e69abd10e683b.zip | |
net: ipv6: seg6_iptunnel: mitigate 2-realloc issue
[ Upstream commit 40475b63761abb6f8fdef960d03228a08662c9c4 ]
This patch mitigates the two-reallocations issue with seg6_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
the improvement:
- before: https://ibb.co/3Cg4sNH
- after: https://ibb.co/8rQ350r
Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Cc: David Lebrun <dlebrun@google.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