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Willy Tarreau e3b2704e26 BUG/MINOR: freq_ctr: fix possible negative rate with the scaled API 
In 1.9 with commit 627505d36 ("MINOR: freq_ctr: add swrate_add_scaled()
to work with large samples") we got the ability to indicate when adding
some values that they represent a number of samples. However there is an
issue in the calculation which is that the number of samples that is
added to the sum before the division in order to avoid fading away too
fast, is multiplied by the scale. The problem it causes is that this is
done in the negative part of the expression, and that as soon if the sum
of old_sum and v*s is too small (e.g. zero), we end up with a negative
value of -s.

This is visible in "show pools" which occasionally report a very large
value on "needed_avg" since 2.9, though the bug has been there for longer.
Indeed in 2.9 since they're hashed in buckets, it suffices that any
thread got one such error once for the sum to be wrong. One possible
impact is memory usage not shrinking after a short burst due to pools
refraining from releasing objects, believing they don't have enough.

This must be backported to all versions. Note that the opportunistic
version can be dropped before 2.8.
2023-09-14 11:09:07 +02:00
.github CI: musl: drop shopt in workflow invocation 2023-09-08 19:05:04 +02:00
addons BUG/MINOR: promex: fix backend_agg_check_status 2023-09-12 19:50:17 +02:00
admin MINOR: acme.sh: add the deploy script for acme.sh in admin directory 2023-04-26 17:32:15 +02:00
dev DEV: flags/show-sess-to-flags: properly decode fd.state 2023-08-14 08:48:49 +02:00
doc DOC: configuration: add %[query] to %HQ 2023-09-13 15:56:23 +02:00
examples EXAMPLES: maintain haproxy 2.8 retrocompatibility for lua mailers script 2023-07-11 16:04:22 +02:00
include BUG/MINOR: freq_ctr: fix possible negative rate with the scaled API 2023-09-14 11:09:07 +02:00
reg-tests MINOR: ssl: add support for 'curves' keyword on server lines 2023-09-07 23:29:10 +02:00
scripts CI: scripts: add support to build-ssl.sh to download and build AWS-LC 2023-09-06 13:41:36 +02:00
src BUG/MINOR: quic: Leak of frames to send. 2023-09-13 15:32:14 +02:00
tests MAJOR: import: update mt_list to support exponential back-off 2023-09-13 11:50:33 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 13-1 2023-04-23 09:44:53 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore CONTRIB: Add vi file extensions to .gitignore 2023-06-02 18:14:34 +02:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml CI: travis-ci: temporarily disable arm64 builds 2021-08-07 07:28:15 +02:00
BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 2.9-dev5 2023-09-08 19:21:45 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
INSTALL BUILD: ssl: Build with new cryptographic library AWS-LC 2023-09-04 18:19:18 +02:00
LICENSE
MAINTAINERS CLEANUP: assorted typo fixes in the code and comments 2022-11-30 14:02:36 +01:00
Makefile BUILD: ssl: Build with new cryptographic library AWS-LC 2023-09-04 18:19:18 +02:00
README DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 2.9-dev5 2023-09-08 19:21:45 +02:00
VERSION [RELEASE] Released version 2.9-dev5 2023-09-08 19:21:45 +02:00

README 

The HAProxy documentation has been split into a number of different files for
ease of use.

Please refer to the following files depending on what you're looking for :

  - INSTALL for instructions on how to build and install HAProxy
  - BRANCHES to understand the project's life cycle and what version to use
  - LICENSE for the project's license
  - CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory :

  - doc/intro.txt for a quick introduction on HAProxy
  - doc/configuration.txt for the configuration's reference manual
  - doc/lua.txt for the Lua's reference manual
  - doc/SPOE.txt for how to use the SPOE engine
  - doc/network-namespaces.txt for how to use network namespaces under Linux
  - doc/management.txt for the management guide
  - doc/regression-testing.txt for how to use the regression testing suite
  - doc/peers.txt for the peers protocol reference
  - doc/coding-style.txt for how to adopt HAProxy's coding style
  - doc/internals for developer-specific documentation (not all up to date)