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| author | Willem de Bruijn <[email protected]> | 2023-02-14 15:57:40 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2023-02-16 05:26:36 +0000 |
| commit | 14ade6ba4120fb38fcb5033998882c5b3d591194 (patch) | |
| tree | a1e1c6ca6657492cad217a349b73a10556bef625 /drivers/net/ethernet/intel/ice/ice_main.c | |
| parent | net: phy: c45: genphy_c45_an_config_aneg(): fix uninitialized symbol error (diff) | |
| download | kernel-14ade6ba4120fb38fcb5033998882c5b3d591194.tar.gz kernel-14ade6ba4120fb38fcb5033998882c5b3d591194.zip | |
net: msg_zerocopy: elide page accounting if RLIM_INFINITY
MSG_ZEROCOPY ensures that pinned user pages do not exceed the limit.
If no limit is set, skip this accounting as otherwise expensive
atomic_long operations are called for no reason.
This accounting is already skipped for privileged (CAP_IPC_LOCK)
users. Rely on the same mechanism: if no mmp->user is set,
mm_unaccount_pinned_pages does not decrement either.
Tested by running tools/testing/selftests/net/msg_zerocopy.sh with
an unprivileged user for the TXMODE binary:
ip netns exec "${NS1}" sudo -u "{$USER}" "${BIN}" "-${IP}" ...
Signed-off-by: Willem de Bruijn <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_main.c')
0 files changed, 0 insertions, 0 deletions