Mercurial > hg > nginx-quic
annotate auto/feature @ 5541:fdb67cfc957d
Fixed TCP_DEFER_ACCEPT handling (ticket #353).
Backed out 05a56ebb084a, as it turns out that kernel can return connections
without any delay if syncookies are used. This basically means we can't
assume anything about connections returned with deferred accept set.
To solve original problem the 05a56ebb084a tried to solve, i.e. to don't
wait longer than needed if a connection was accepted after deferred accept
timeout, this patch changes a timeout set with setsockopt(TCP_DEFER_ACCEPT)
to 1 second, unconditionally. This is believed to be enough for speed
improvements, and doesn't imply major changes to timeouts used.
Note that before 2.6.32 connections were dropped after a timeout. Though
it is believed that 1s is still appropriate for kernels before 2.6.32,
as previously tcp_synack_retries controlled the actual timeout and 1s results
in more than 1 minute actual timeout by default.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Tue, 28 Jan 2014 15:40:46 +0400 |
parents | 434548349838 |
children | e3faa5fb7772 |
rev | line source |
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1 |
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2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
444
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5 |
455 | 6 echo $ngx_n "checking for $ngx_feature ...$ngx_c" |
7 | |
8 cat << END >> $NGX_AUTOCONF_ERR | |
9 | |
10 ---------------------------------------- | |
11 checking for $ngx_feature | |
12 | |
13 END | |
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15 ngx_found=no |
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16 |
455 | 17 if test -n "$ngx_feature_name"; then |
645 | 18 ngx_have_feature=`echo $ngx_feature_name \ |
19 | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ` | |
455 | 20 fi |
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21 |
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22 if test -n "$ngx_feature_path"; then |
2139 | 23 for ngx_temp in $ngx_feature_path; do |
24 ngx_feature_inc_path="$ngx_feature_inc_path -I $ngx_temp" | |
25 done | |
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26 fi |
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27 |
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28 cat << END > $NGX_AUTOTEST.c |
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29 |
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30 #include <sys/types.h> |
455 | 31 $NGX_INCLUDE_UNISTD_H |
32 $ngx_feature_incs | |
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34 int main() { |
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35 $ngx_feature_test; |
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36 return 0; |
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37 } |
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38 |
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39 END |
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40 |
455 | 41 |
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42 ngx_test="$CC $CC_TEST_FLAGS $CC_AUX_FLAGS $ngx_feature_inc_path \ |
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43 -o $NGX_AUTOTEST $NGX_AUTOTEST.c $NGX_TEST_LD_OPT $ngx_feature_libs" |
461 | 44 |
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45 ngx_feature_inc_path= |
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46 |
946 | 47 eval "/bin/sh -c \"$ngx_test\" >> $NGX_AUTOCONF_ERR 2>&1" |
455 | 48 |
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49 |
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50 if [ -x $NGX_AUTOTEST ]; then |
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51 |
619 | 52 case "$ngx_feature_run" in |
53 | |
54 yes) | |
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55 # /bin/sh is used to intercept "Killed" or "Abort trap" messages |
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56 if /bin/sh -c $NGX_AUTOTEST >> $NGX_AUTOCONF_ERR 2>&1; then |
619 | 57 echo " found" |
58 ngx_found=yes | |
455 | 59 |
619 | 60 if test -n "$ngx_feature_name"; then |
61 have=$ngx_have_feature . auto/have | |
62 fi | |
455 | 63 |
619 | 64 else |
65 echo " found but is not working" | |
66 fi | |
67 ;; | |
68 | |
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69 value) |
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70 # /bin/sh is used to intercept "Killed" or "Abort trap" messages |
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71 if /bin/sh -c $NGX_AUTOTEST >> $NGX_AUTOCONF_ERR 2>&1; then |
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72 echo " found" |
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73 ngx_found=yes |
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74 |
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75 cat << END >> $NGX_AUTO_CONFIG_H |
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76 |
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77 #ifndef $ngx_feature_name |
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78 #define $ngx_feature_name `$NGX_AUTOTEST` |
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79 #endif |
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80 |
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81 END |
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82 else |
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83 echo " found but is not working" |
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84 fi |
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85 ;; |
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86 |
619 | 87 bug) |
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88 # /bin/sh is used to intercept "Killed" or "Abort trap" messages |
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89 if /bin/sh -c $NGX_AUTOTEST >> $NGX_AUTOCONF_ERR 2>&1; then |
619 | 90 echo " not found" |
455 | 91 |
619 | 92 else |
93 echo " found" | |
94 ngx_found=yes | |
95 | |
96 if test -n "$ngx_feature_name"; then | |
97 have=$ngx_have_feature . auto/have | |
98 fi | |
99 fi | |
100 ;; | |
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101 |
619 | 102 *) |
103 echo " found" | |
104 ngx_found=yes | |
455 | 105 |
619 | 106 if test -n "$ngx_feature_name"; then |
107 have=$ngx_have_feature . auto/have | |
108 fi | |
109 ;; | |
455 | 110 |
619 | 111 esac |
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112 |
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113 else |
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114 echo " not found" |
455 | 115 |
116 echo "----------" >> $NGX_AUTOCONF_ERR | |
117 cat $NGX_AUTOTEST.c >> $NGX_AUTOCONF_ERR | |
118 echo "----------" >> $NGX_AUTOCONF_ERR | |
119 echo $ngx_test >> $NGX_AUTOCONF_ERR | |
120 echo "----------" >> $NGX_AUTOCONF_ERR | |
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121 fi |
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122 |
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123 rm -rf $NGX_AUTOTEST* |