Mercurial > hg > nginx
view contrib/README @ 5970:74edc0ccf27a
Core: fixed a race resulting in extra sem_post()'s.
The mtx->wait counter was not decremented if we were able to obtain the lock
right after incrementing it. This resulted in unneeded sem_post() calls,
eventually leading to EOVERFLOW errors being logged, "sem_post() failed
while wake shmtx (75: Value too large for defined data type)".
To close the race, mtx->wait is now decremented if we obtain the lock right
after incrementing it in ngx_shmtx_lock(). The result can become -1 if a
concurrent ngx_shmtx_unlock() decrements mtx->wait before the added code does.
However, that only leads to one extra iteration in the next call of
ngx_shmtx_lock().
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 04 Feb 2015 16:22:43 +0300 |
parents | 1bdf906bba99 |
children |
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geo2nginx.pl by Andrei Nigmatulin The perl script to convert CSV geoip database ( free download at http://www.maxmind.com/app/geoip_country ) to format, suitable for use by the ngx_http_geo_module. unicode2nginx by Maxim Dounin The perl script to convert unicode mappings ( available at http://www.unicode.org/Public/MAPPINGS/ ) to the nginx configuration file format. Two generated full maps for windows-1251 and koi8-r. vim by Evan Miller Syntax highlighting of nginx configuration for vim, to be placed into ~/.vim/.