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Gzip: support for a zlib variant from Intel.
A zlib variant from Intel as available from https://github.com/jtkukunas/zlib
uses 64K hash instead of scaling it from the specified memory level, and
also uses 16-byte padding in one of the window-sized memory buffers, and can
force window bits to 13 if compression level is set to 1 and appropriate
compile options are used. As a result, nginx complained with "gzip filter
failed to use preallocated memory" alerts.
This change improves deflate_state allocation detection by testing that
items is 1 (deflate_state is the only allocation where items is 1).
Additionally, on first failure to use preallocated memory we now assume
that we are working with the Intel's modified zlib, and switch to using
appropriate preallocations. If this does not help, we complain with the
usual alerts.
Previous version of this patch was published at
http://mailman.nginx.org/pipermail/nginx/2014-July/044568.html.
The zlib variant in question is used by default in ClearLinux from Intel,
see http://mailman.nginx.org/pipermail/nginx-ru/2017-October/060421.html,
http://mailman.nginx.org/pipermail/nginx-ru/2017-November/060544.html.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Sat, 18 Nov 2017 04:03:27 +0300 |
parents | 4dc8e7b62216 |
children | ec2e6893caaa |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. have=NGX_FREEBSD . auto/have_headers CORE_INCS="$UNIX_INCS" CORE_DEPS="$UNIX_DEPS $FREEBSD_DEPS" CORE_SRCS="$UNIX_SRCS $FREEBSD_SRCS" ngx_spacer=' ' # __FreeBSD_version and sysctl kern.osreldate are the best ways # to determine whether some capability exists and is safe to use. # __FreeBSD_version is used for the testing of the build environment. # sysctl kern.osreldate is used for the testing of the kernel capabilities. version=`grep "#define __FreeBSD_version" /usr/include/osreldate.h \ | sed -e 's/^.* \(.*\)$/\1/'` osreldate=`/sbin/sysctl -n kern.osreldate` # setproctitle() in libutil if [ \( $version -ge 500000 -a $version -lt 500012 \) \ -o $version -lt 410002 ] then echo " + setproctitle() in libutil" CORE_LIBS="$CORE_LIBS -lutil" NGX_SETPROCTITLE_LIB="-lutil" fi # sendfile if [ $osreldate -gt 300007 ]; then echo " + sendfile() found" have=NGX_HAVE_SENDFILE . auto/have CORE_SRCS="$CORE_SRCS $FREEBSD_SENDFILE_SRCS" fi if [ $NGX_FILE_AIO = YES ]; then if [ $osreldate -gt 502103 ]; then echo " + sendfile()'s SF_NODISKIO found" have=NGX_HAVE_AIO_SENDFILE . auto/have fi fi # POSIX semaphores # http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/127545 if [ $osreldate -ge 701106 ]; then echo " + POSIX semaphores should work" else have=NGX_HAVE_POSIX_SEM . auto/nohave fi # kqueue if [ \( $osreldate -lt 500000 -a $osreldate -ge 410000 \) \ -o $osreldate -ge 500011 ] then echo " + kqueue found" have=NGX_HAVE_KQUEUE . auto/have have=NGX_HAVE_CLEAR_EVENT . auto/have EVENT_MODULES="$EVENT_MODULES $KQUEUE_MODULE" CORE_SRCS="$CORE_SRCS $KQUEUE_SRCS" EVENT_FOUND=YES fi NGX_KQUEUE_CHECKED=YES # kqueue's NOTE_LOWAT if [ \( $version -lt 500000 -a $version -ge 430000 \) \ -o $version -ge 500018 ] then echo " + kqueue's NOTE_LOWAT found" have=NGX_HAVE_LOWAT_EVENT . auto/have fi # kqueue's EVFILT_TIMER if [ \( $version -lt 500000 -a $version -ge 440001 \) \ -o $version -ge 500023 ] then echo " + kqueue's EVFILT_TIMER found" have=NGX_HAVE_TIMER_EVENT . auto/have fi # cpuset_setaffinity() if [ $version -ge 701000 ]; then echo " + cpuset_setaffinity() found" have=NGX_HAVE_CPUSET_SETAFFINITY . auto/have fi