Diffusion FreeBSD src repository 6573d7580b85

epoch(9): allow preemptible epochs to compose
6573d7580b85
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Description

epoch(9): allow preemptible epochs to compose

Add tracker argument to preemptible epochs
Inline epoch read path in kernel and tied modules
Change in_epoch to take an epoch as argument
Simplify tfb_tcp_do_segment to not take a ti_locked argument, there's no longer any benefit to dropping the pcbinfo lock and trying to do so just adds an error prone branchfest to these functions
Remove cases of same function recursion on the epoch as recursing is no longer free.
Remove the the TAILQ_ENTRY and epoch_section from struct thread as the tracker field is now stack or heap allocated as appropriate.

Tested by: pho and Limelight Networks
Reviewed by: kbowling at llnw dot com
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D16066

epoch(9): allow preemptible epochs to compose6573d7580b85Actions

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Event Timeline

Changes (44)

rG6573d7580b85

sys/dev/cxgbe/cxgbei/cxgbei.c

sys/dev/cxgbe/tom/t4_connect.c

sys/dev/cxgbe/tom/t4_cpl_io.c

sys/dev/cxgbe/tom/t4_listen.c

sys/dev/cxgbe/tom/t4_tls.c

sys/dev/hwpmc/hwpmc_mod.c

sys/kern/subr_epoch.c

sys/net/if.c

sys/net/if_gif.h

sys/net/if_gre.h

sys/net/if_lagg.c

sys/net/if_me.c

sys/net/if_var.h

sys/net/route.c

sys/net/rtsock.c

sys/netinet/in_gif.c

sys/netinet/in_pcb.c

sys/netinet/in_pcb.h

sys/netinet/ip_divert.c

sys/netinet/ip_encap.c

sys/netinet/ip_gre.c

sys/netinet/raw_ip.c

sys/netinet/tcp_hpts.c

sys/netinet/tcp_hpts.h

sys/netinet/tcp_input.c

sys/netinet/tcp_stacks/fastpath.c

sys/netinet/tcp_stacks/rack.c

sys/netinet/tcp_stacks/tcp_rack.h

sys/netinet/tcp_subr.c

sys/netinet/tcp_timer.c

sys/netinet/tcp_timer.h

sys/netinet/tcp_timewait.c

sys/netinet/tcp_usrreq.c

sys/netinet/tcp_var.h

sys/netinet/udp_usrreq.c

sys/netinet6/icmp6.c

sys/netinet6/in6_gif.c

sys/netinet6/ip6_gre.c

sys/netinet6/raw_ip6.c

sys/netinet6/udp6_usrreq.c

sys/sys/epoch.h

sys/sys/epoch_private.h

sys/sys/pmckern.h

sys/sys/proc.h

epoch(9): allow preemptible epochs to compose
6573d7580b85
Actions