Mercurial > hg > nginx
annotate auto/threads @ 7951:c7a8bdf5af55
Changed ngx_chain_update_chains() to test tag first (ticket #2248).
Without this change, aio used with HTTP/2 can result in connection hang,
as observed with "aio threads; aio_write on;" and proxying (ticket #2248).
The problem is that HTTP/2 updates buffers outside of the output filters
(notably, marks them as sent), and then posts a write event to call
output filters. If a filter does not call the next one for some reason
(for example, because of an AIO operation in progress), this might
result in a state when the owner of a buffer already called
ngx_chain_update_chains() and can reuse the buffer, while the same buffer
is still sitting in the busy chain of some other filter.
In the particular case a buffer was sitting in output chain's ctx->busy,
and was reused by event pipe. Output chain's ctx->busy was permanently
blocked by it, and this resulted in connection hang.
Fix is to change ngx_chain_update_chains() to skip buffers from other
modules unconditionally, without trying to wait for these buffers to
become empty.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Sat, 30 Oct 2021 02:39:19 +0300 |
parents | 04ebf29eaf5b |
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Thread pools implementation.
Valentin Bartenev <vbart@nginx.com>
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1 |
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2 # Copyright (C) Nginx, Inc. |
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3 |
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4 |
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5 if [ $USE_THREADS = YES ]; then |
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6 |
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7 if [ "$NGX_PLATFORM" = win32 ]; then |
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8 cat << END |
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9 |
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10 $0: --with-threads is not supported on Windows |
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11 |
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12 END |
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13 exit 1 |
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14 fi |
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15 |
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16 have=NGX_THREADS . auto/have |
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17 CORE_DEPS="$CORE_DEPS $THREAD_POOL_DEPS" |
466bd63b63d1
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Valentin Bartenev <vbart@nginx.com>
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18 CORE_SRCS="$CORE_SRCS $THREAD_POOL_SRCS" |
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19 CORE_LIBS="$CORE_LIBS -lpthread" |
7246
04ebf29eaf5b
Configure: fixed static compilation with OpenSSL 1.1.1.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6018
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20 NGX_LIBPTHREAD="-lpthread" |
6018
466bd63b63d1
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Valentin Bartenev <vbart@nginx.com>
parents:
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21 fi |