On Thu, Sep 21, 2023 at 9:42 PM Ilya Maximets <[email protected]> wrote: > > do_execute_actions() function can be called recursively multiple > times while executing actions that require pipeline forking or > recirculations. It may also be re-entered multiple times if the packet > leaves openvswitch module and re-enters it through a different port. > > Currently, there is a 256-byte array allocated on stack in this > function that is supposed to hold NSH header. Compilers tend to > pre-allocate that space right at the beginning of the function: > > a88: 48 81 ec b0 01 00 00 sub $0x1b0,%rsp > > NSH is not a very common protocol, but the space is allocated on every > recursive call or re-entry multiplying the wasted stack space. >
Reviewed-by: Eric Dumazet <[email protected]> _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
