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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 | 30b6f1ff192b |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. echo "checking for perl" NGX_PERL_VER=`$NGX_PERL -v 2>&1 | grep '^This is perl' 2>&1 \ | sed -e 's/^This is perl, \(.*\)/\1/'` if test -n "$NGX_PERL_VER"; then echo " + perl version: $NGX_PERL_VER" if [ "`$NGX_PERL -e 'use 5.008006; print "OK"'`" != "OK" ]; then echo echo "$0: error: perl 5.8.6 or higher is required" echo exit 1; fi if [ "`$NGX_PERL -MExtUtils::Embed -e 'print "OK"'`" != "OK" ]; then echo echo "$0: error: perl module ExtUtils::Embed is required" echo exit 1; fi NGX_PM_CFLAGS=`$NGX_PERL -MExtUtils::Embed -e ccopts` NGX_PM_LDFLAGS=`$NGX_PERL -MConfig -e 'print $Config{lddlflags}'` NGX_PERL_CFLAGS="$CFLAGS `$NGX_PERL -MExtUtils::Embed -e ccopts`" # gcc 4.1/4.2 warn about unused values in pTHX_ NGX_PERL_CFLAGS=`echo $NGX_PERL_CFLAGS \ | sed -e 's/-Wunused-value/-Wno-unused-value/'` # icc8 warns 'declaration hides parameter "my_perl"' in ENTER and LEAVE NGX_PERL_CFLAGS=`echo $NGX_PERL_CFLAGS \ | sed -e 's/-wd171/-wd171 -wd1599/'` ngx_perl_ldopts=`$NGX_PERL -MExtUtils::Embed -e ldopts` ngx_perl_dlext=`$NGX_PERL -MConfig -e 'print $Config{dlext}'` ngx_perl_libdir="src/http/modules/perl/blib/arch/auto" ngx_perl_module="$ngx_perl_libdir/nginx/nginx.$ngx_perl_dlext" if $NGX_PERL -V:usemultiplicity | grep define > /dev/null; then have=NGX_HAVE_PERL_MULTIPLICITY . auto/have echo " + perl interpreter multiplicity found" fi if $NGX_PERL -V:useithreads | grep undef > /dev/null; then # FreeBSD port wants to link with -pthread non-threaded perl ngx_perl_ldopts=`echo $ngx_perl_ldopts | sed 's/ -pthread//'` fi if [ "$NGX_SYSTEM" = "Darwin" ]; then # OS X system perl wants to link universal binaries ngx_perl_ldopts=`echo $ngx_perl_ldopts \ | sed -e 's/-arch i386//' -e 's/-arch x86_64//'` fi if [ $USE_PERL = YES ]; then CORE_LINK="$CORE_LINK $ngx_perl_ldopts" fi NGX_LIB_PERL="$ngx_perl_ldopts" if test -n "$NGX_PERL_MODULES"; then have=NGX_PERL_MODULES value="(u_char *) \"$NGX_PERL_MODULES\"" . auto/define NGX_PERL_MODULES_MAN=$NGX_PERL_MODULES/man3 fi else echo echo "$0: error: perl 5.8.6 or higher is required" echo exit 1; fi