Mercurial > hg > nginx
view docs/GNUmakefile @ 6080:4296627f385a stable-1.6
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 | f303f3e43f7b |
| children | 1bc938b270dc |
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VER= $(shell grep 'define NGINX_VERSION' src/core/nginx.h \ | sed -e 's/^.*"\(.*\)".*/\1/') NGINX= nginx-$(VER) TEMP= tmp XSLS?= xslscript.pl all: changes changes: $(TEMP)/$(NGINX)/CHANGES.ru \ $(TEMP)/$(NGINX)/CHANGES $(TEMP)/$(NGINX)/CHANGES.ru: docs/dtd/changes.dtd \ docs/xml/nginx/changes.xml \ docs/xml/change_log_conf.xml \ docs/xslt/changes.xslt mkdir -p $(TEMP)/$(NGINX) xmllint --noout --valid docs/xml/nginx/changes.xml xsltproc --stringparam lang ru \ -o $@ docs/xslt/changes.xslt docs/xml/nginx/changes.xml $(TEMP)/$(NGINX)/CHANGES: docs/dtd/changes.dtd \ docs/xml/nginx/changes.xml \ docs/xml/change_log_conf.xml \ docs/xslt/changes.xslt mkdir -p $(TEMP)/$(NGINX) xmllint --noout --valid docs/xml/nginx/changes.xml xsltproc --stringparam lang en \ -o $@ docs/xslt/changes.xslt docs/xml/nginx/changes.xml docs/xslt/changes.xslt: docs/xsls/changes.xsls $(XSLS) -o $@ $<