Conrad Hoffmann 041751c13a BUG/MEDIUM: polling: fix possible CPU hogging of worker processes after receiving SIGUSR1. ... When run in daemon mode (i.e. with at least one forked process) and using the epoll poller, sending USR1 (graceful shutdown) to the worker processes can cause some workers to start running at 100% CPU. Precondition is having an established HTTP keep-alive connection when the signal is received. The cloned (during fork) listening sockets do not get closed in the parent process, thus they do not get removed from the epoll set automatically (see man 7 epoll). This can lead to the process receiving epoll events that it doesn't feel responsible for, resulting in an endless loop around epoll_wait() delivering these events. The solution is to explicitly remove these file descriptors from the epoll set. To not degrade performance, care was taken to only do this when neccessary, i.e. when the file descriptor was cloned during fork. Signed-off-by: Conrad Hoffmann <conrad@soundcloud.com> [wt: a backport to 1.4 could be studied though chances to catch the bug are low]		2014-05-20 14:57:36 +02:00
..
acl.h	MINOR: pattern: store configuration reference for each acl or map pattern.	2014-03-17 18:06:07 +01:00
arg.h
auth.h	MEDIUM: pattern: The match function browse itself the list or the tree.	2014-03-17 18:06:07 +01:00
backend.h	MINOR: server: create srv_was_usable() from srv_is_usable() and use a pointer	2014-05-13 22:34:55 +02:00
channel.h	CLEANUP: buffers: remove unused function buffer_contig_space_with_res()	2014-04-24 17:19:22 +02:00
checks.h	MINOR: checks: use an inline function for health_adjust()	2013-12-31 23:47:37 +01:00
compression.h
connection.h	MEDIUM: connection: Implement and extented PROXY Protocol V2	2014-05-09 08:25:38 +02:00
cttproxy.h
dumpstats.h	MEDIUM: stats: reimplement HTTP keep-alive on the stats page	2014-04-24 17:24:56 +02:00
fd.h	BUG/MEDIUM: polling: fix possible CPU hogging of worker processes after receiving SIGUSR1.	2014-05-20 14:57:36 +02:00
freq_ctr.h
frontend.h
hdr_idx.h
lb_chash.h
lb_fas.h
lb_fwlc.h
lb_fwrr.h
lb_map.h
listener.h
log.h	MINOR: configuration: File and line propagation	2014-03-17 18:06:08 +01:00
map.h	MINOR: map: export parse output sample functions	2013-12-12 15:44:05 +01:00
obj_type.h	MINOR: obj: introduce a new type appctx	2013-12-09 15:40:22 +01:00
pattern.h	MEDIUM: pattern: use ebtree's longest match to index/lookup string beginning	2014-05-10 08:53:48 +02:00
payload.h
peers.h
pipe.h
port_range.h
proto_http.h	MINOR: http: export the smp_fetch_cookie function	2014-05-02 18:05:15 +02:00
proto_tcp.h	BUG/MEDIUM: stick-table: fix IPv4-to-IPv6 conversion in src_* fetches	2014-04-14 18:22:57 +02:00
proto_uxst.h
protocol.h
proxy.h	MEDIUM: proxy: create a tree to store proxies by name	2014-03-15 07:48:35 +01:00
queue.h	MINOR: server: create srv_was_usable() from srv_is_usable() and use a pointer	2014-05-13 22:34:55 +02:00
raw_sock.h
sample.h	MINOR: configuration: File and line propagation	2014-03-17 18:06:08 +01:00
server.h	MINOR: server: remove the SRV_DRAIN flag which can always be deduced	2014-05-13 22:18:13 +02:00
session.h	MEDIUM: counters: stop relying on session flags at all	2014-01-28 23:34:45 +01:00
shctx.h	BUG/MAJOR: ssl: Fallback to private session cache if current lock mode is not supported.	2014-05-08 22:46:32 +02:00
signal.h
ssl_sock.h	MEDIUM: connection: Implement and extented PROXY Protocol V2	2014-05-09 08:25:38 +02:00
stick_table.h
stream_interface.h	MEDIUM: stream-int: make si_connect() return an established state when possible	2013-12-31 23:32:12 +01:00
task.h
template.h