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Jonas Köppeler
7f4f824691
Backport upstream commit a3729e0df005 ("net/sched: sch_cake: skip
clearing unused tins during rate adjustment"), which landed in v7.2.
cake_configure_rates() is called from the dequeue path with
rate_adjust=true, where cake_clear_tin() overwrites q->cur_tin and
q->cur_flow while cake_dequeue() is using them, and purging the unused
tins adds overhead to the hot path. Skipping the loop restores loaded
latency to pre-15c2715a5264 levels; on IPQ8074A in besteffort mode the
loaded latency drops from ~470 ms to ~4 ms in Flent's tcp_nup test.
Refresh the sync_time debugfs hack patch, whose hunks shift by two
lines.
Signed-off-by: Jonas Köppeler <j.koeppeler@tu-berlin.de>
Link: https://github.com/openwrt/openwrt/pull/25182
Signed-off-by: Robert Marko <robimarko@gmail.com>