Jonathan Lemon c3f812cea0 page_pool: do not release pool until inflight == 0. ... The page pool keeps track of the number of pages in flight, and it isn't safe to remove the pool until all pages are returned. Disallow removing the pool until all pages are back, so the pool is always available for page producers. Make the page pool responsible for its own delayed destruction instead of relying on XDP, so the page pool can be used without the xdp memory model. When all pages are returned, free the pool and notify xdp if the pool is registered with the xdp memory system. Have the callback perform a table walk since some drivers (cpsw) may share the pool among multiple xdp_rxq_info. Note that the increment of pages_state_release_cnt may result in inflight == 0, resulting in the pool being released. Fixes: d956a048cd ("xdp: force mem allocator removal and periodic warning") Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-11-16 12:39:10 -08:00
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events	page_pool: do not release pool until inflight == 0.	2019-11-16 12:39:10 -08:00
bpf_probe.h	bpf: Add typecast to raw_tracepoints to help BTF generation	2019-10-17 16:44:35 +02:00
define_trace.h	tracing: introduce TRACE_EVENT_NOP()	2019-04-08 09:22:51 -04:00
perf.h
syscall.h
trace_events.h	tracing: Prevent further users of zero size static arrays in trace events	2018-05-29 08:29:13 -04:00