Willy Tarreau 86c6a9221a BUG/MEDIUM: shctx: bound the number of loops that can happen around the lock ... Given that a "count" value of 32M was seen in _shctx_wait4lock(), it is very important to prevent this from happening again. It's absolutely essential to prevent the value from growing unbounded because with an increase of the number of threads, the number of successive failed attempts will necessarily grow. Instead now we're scanning all 2^p-1 values from 3 to 255 and are bounding to count to 255 so that in the worst case each thread tries an xchg every 255 failed read attempts. That's one every 4 on average per thread when there are 64 threads, which corresponds to the initial count of 4 for the first attempt so it seems like a reasonable value to keep a low latency. The bug was introduced with the shctx entries in 1.5 so the fix must be backported to all versions. Before 1.8 the function was called _shared_context_wait4lock() and was in shctx.c.		2020-05-01 13:32:20 +02:00
..
acl.h	MINOR: acl: Pass the ACLs as an explicit parameter of build_acl_cond	2017-10-31 11:36:12 +01:00
action.h	MINOR: tcp-rules: Make tcp-request capture a custom action	2020-01-20 15:18:45 +01:00
activity.h	MINOR: time: move the cpu, mono, and idle time to thread_info	2019-05-20 21:14:14 +02:00
applet.h	MEDIUM: buffer: remove the buffer_wq lock	2020-02-26 10:39:36 +01:00
arg.h	MEDIUM: arg: make make_arg_list() stop after its own arguments	2020-02-14 19:02:06 +01:00
auth.h	MEDIUM: pattern: The match function browse itself the list or the tree.	2014-03-17 18:06:07 +01:00
backend.h	REORG: stream/backend: move backend-specific stuff to backend.c	2020-01-17 18:30:36 +01:00
channel.h	MEDIUM: buffer: remove the buffer_wq lock	2020-02-26 10:39:36 +01:00
checks.h	CLEANUP: checks: Fix checks includes	2020-04-29 13:32:29 +02:00
cli.h	MINOR: cli: add cli_msg(), cli_err(), cli_dynmsg(), cli_dynerr()	2019-08-09 10:11:38 +02:00
compression.h	REORG: filters: Prepare creation of the HTTP compression filter	2016-02-09 14:53:15 +01:00
connection.h	MINOR: connection: Add a function to install a mux for a health-check	2020-04-27 09:39:38 +02:00
dict.h	MINOR: dict: Add dictionary new data structure.	2019-06-05 08:33:35 +02:00
dns.h	MINOR: action: new '(http-request|tcp-request content) do-resolve' action	2019-04-23 11:41:52 +02:00
fcgi-app.h	MEDIUM: fcgi-app: Add FCGI application and filter	2019-09-17 10:18:54 +02:00
fd.h	CLEANUP: assorted typo fixes in the code and comments	2020-04-17 09:37:36 +02:00
filters.h	MEDIUM: filters: Adapt filters API to allow again TCP filtering on HTX streams	2019-11-15 13:43:08 +01:00
flt_http_comp.h	MINOR: compression: Rename the function check_legacy_http_comp_flt()	2018-12-11 17:09:31 +01:00
freq_ctr.h	BUILD: freq_ctr: proto/freq_ctr needs to include common/standard.h	2020-03-07 06:07:18 +01:00
frontend.h	REORG/MAJOR: session: rename the "session" entity to "stream"	2015-04-06 11:23:56 +02:00
h1_htx.h	MEDIUM: h1-htx: Add HTX EOM block when the message is in H1_MSG_DONE state	2019-12-11 16:46:16 +01:00
hlua_fcn.h	MINOR: lua: add utility function for check boolean argument	2016-11-24 21:35:10 +01:00
hlua.h	MINOR: lua: export applet and task handlers	2019-08-21 14:32:09 +02:00
http_ana.h	MEDIUM: http: Add a ruleset evaluated on all responses just before forwarding	2020-02-06 14:55:34 +01:00
http_fetch.h	MEDIUM: http_fetch: Remove code relying on HTTP legacy mode	2019-07-19 09:18:27 +02:00
http_htx.h	MINOR: http-htx: Export functions to update message authority and host	2020-04-29 13:32:29 +02:00
http_rules.h	MEDIUM: http: Add a ruleset evaluated on all responses just before forwarding	2020-02-06 14:55:34 +01:00
lb_chash.h	MINOR: lb: allow redispatch when using consistent hash	2019-01-02 20:22:17 +01:00
lb_fas.h	MEDIUM: backend: add the 'first' balancing algorithm	2012-02-21 22:27:27 +01:00
lb_fwlc.h	[CLEANUP] backend: move LB algos to individual files	2009-10-01 11:19:37 +02:00
lb_fwrr.h	[CLEANUP] backend: move LB algos to individual files	2009-10-01 11:19:37 +02:00
lb_map.h	MEDIUM: threads/lb: Make LB algorithms (lb_*.c) thread-safe	2017-10-31 13:58:31 +01:00
listener.h	BUG/MINOR: listener: fix off-by-one in state name check	2019-12-11 15:51:37 +01:00
log.h	CLEANUP: assorted typo fixes in the code and comments	2020-03-14 09:42:07 +01:00
map.h	MINOR: samples: rename some struct member from "smp" to "data"	2015-08-20 17:13:46 +02:00
mux_pt.h	MEDIUM: connection: start to introduce a mux layer between xprt and data	2017-10-31 18:03:23 +01:00
mworker.h	BUG/MINOR: mworker: properly pass SIGTTOU/SIGTTIN to workers	2019-12-11 14:26:53 +01:00
obj_type.h	BUG/MINOR: obj_type: Handle stream object in obj_base_ptr() function	2020-04-27 09:39:38 +02:00
pattern.h	CLEANUP: assorted typo fixes in the code and comments	2020-03-14 09:42:07 +01:00
payload.h	REORG/MAJOR: session: rename the "session" entity to "stream"	2015-04-06 11:23:56 +02:00
peers.h	MINOR: peers: Make peers protocol support new "server_name" data type.	2019-06-05 08:42:33 +02:00
pipe.h	[MEDIUM] introduce pipe pools	2009-01-25 13:49:53 +01:00
port_range.h	BUG/MEDIUM: port_range: Make the ring buffer lock-free.	2019-04-30 15:10:17 +02:00
proto_sockpair.h	MEDIUM: protocol: sockpair protocol	2018-09-12 07:20:17 +02:00
proto_tcp.h	REORG: connection: move tcp_connect_probe() to conn_fd_check()	2019-12-27 16:38:43 +01:00
proto_udp.h	CLEANUP: fix inconsistency between fd->iocb, proto->accept and accept()	2016-04-14 11:18:22 +02:00
protocol_buffers.h	BUG/MINOR: protocol_buffer: Wrong maximum shifting.	2020-04-02 15:09:46 +02:00
protocol.h	BUG/MEDIUM: protocols: add a global lock for the init/deinit stuff	2019-07-24 16:45:02 +02:00
proxy.h	CLEANUP: assorted typo fixes in the code and comments	2020-03-14 09:42:07 +01:00
queue.h	MEDIUM: init: use initcall for all fixed size pool creations	2018-11-26 19:50:32 +01:00
raw_sock.h	CLEANUP: connection: unexport raw_sock and ssl_sock	2016-12-22 23:26:38 +01:00
ring.h	MINOR: ring: add a generic CLI io_handler to dump a ring buffer	2019-08-27 17:14:19 +02:00
sample.h	MINOR: sample: make sample_parse_expr() able to return an end pointer	2020-02-14 19:02:06 +01:00
server.h	BUG/MINOR: peers: Incomplete peers sections should be validated.	2020-04-15 10:47:39 +02:00
session.h	BUG/MEDIUM: sessions: Always pass the mux context as argument to destroy a mux	2020-04-27 15:53:43 +02:00
shctx.h	BUG/MEDIUM: shctx: bound the number of loops that can happen around the lock	2020-05-01 13:32:20 +02:00
signal.h	MEDIUM: initcall: use initcalls for a few initialization functions	2018-11-26 19:50:32 +01:00
sink.h	CLEANUP: assorted typo fixes in the code and comments	2020-03-14 09:42:07 +01:00
spoe.h	BUG/MEDIUM: spoe: Be sure the sample is found before setting its context	2019-05-07 22:16:41 +02:00
ssl_sock.h	MINOR: ssl: Export a generic function to parse an alpn string	2020-04-27 09:39:37 +02:00
stats.h	MINOR: stats: prepare to add a description with each stat/info field	2019-10-10 11:30:07 +02:00
stick_table.h	MINOR: stick-table: Add "server_name" new data type.	2019-06-05 08:33:35 +02:00
stream_interface.h	BUILD: stream-int: fix a few includes dependencies	2020-03-11 14:15:33 +01:00
stream.h	MEDIUM: stream: Make the unique_id member of struct stream a struct ist	2020-03-05 20:21:58 +01:00
task.h	CLEANUP: assorted typo fixes in the code and comments	2020-03-14 09:42:07 +01:00
tcp_rules.h	MINOR: action: Use trk_idx instead of tcp/http_trk_idx	2017-10-31 11:36:12 +01:00
template.h	[CLEANUP] included common/version.h everywhere	2006-06-29 18:54:54 +02:00
trace.h	MINOR: trace: Add a set of macros to trace events if HA is compiled with debug	2019-11-06 10:14:32 +01:00
vars.h	MINOR: vars: Add 'unset-var' action/converter	2016-11-09 22:57:01 +01:00