Sorry, but this is a little too many unknown factors for me to even know that this is a problem in libcurl. It just as well be due to problems in the layers using it.

Unless you can tell us more specifically how we can help you, like for example by providing an example that repeats the problem, I don't see what we can do.

BTW, what is LADP?

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** [bugs:#1185] libcurl in LADP. apache progress cost so much time and CPU usage 98%. gdb show me the function 'Curl_llist_remove'**
**Status:** open
**Labels:** Curl_llist_remove 
**Created:** Fri Feb 01, 2013 10:25 AM UTC by Cupenoruler
**Last Updated:** Fri Feb 01, 2013 10:25 AM UTC
**Owner:** nobody
env:    apache 2.2.22
        curl 7.28.1
        php 5.4.5
I'm using libcurl in LADP. I found the apache progress which named 'httpd' used 98% CPU. Then I used gdb attached the progress.
This situation lasted for 6 hours up to now. I readed the source of the function named 'Curl_llist_remove ()'.  I would think it's a infinite loop.
Er ~ ~ I'm sorry for my poor English and I'm a rookie. Oh! come on ~ please.  (^_^)
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(gdb) bt
\#0  0x00002aaaac8ca6e0 in Curl_llist_remove () from /usr/local/app/program/lib/libcurl.so.4
\#1  0x00002aaaac8ca7a2 in Curl_llist_destroy () from /usr/local/app/program/lib/libcurl.so.4
\#2  0x00002aaaac8cab66 in Curl_hash_clean () from /usr/local/app/program/lib/libcurl.so.4
\#3  0x00002aaaac8a907a in Curl_global_host_cache_dtor () from /usr/local/app/program/lib/libcurl.so.4
\#4  0x00002aaaac8c7035 in curl_global_cleanup () from /usr/local/app/program/lib/libcurl.so.4
\#5  0x00002aaaac7985b9 in zm_shutdown_curl (type=-1375899824, module_number=0, tsrm_ls=0x2aaaac9ea380) at /usr/local/app/soft/php-5.4.5/ext/curl/interface.c:951
\#6  0x00002aaaab102587 in module_destructor (module=0x759d80) at /usr/local/app/soft/php-5.4.5/Zend/zend_API.c:2262
\#7  0x00002aaaab10ad02 in zend_hash_apply_deleter (ht=0x2aaaab79c220, p=0x759d20) at /usr/local/app/soft/php-5.4.5/Zend/zend_hash.c:650
\#8  0x00002aaaab10afa8 in zend_hash_graceful_reverse_destroy (ht=0x2aaaab79c220) at /usr/local/app/soft/php-5.4.5/Zend/zend_hash.c:687
\#9  0x00002aaaab0fd66a in zend_shutdown (tsrm_ls=0x839380) at /usr/local/app/soft/php-5.4.5/Zend/zend.c:823
\#10 0x00002aaaab0948f5 in php_module_shutdown (tsrm_ls=0x839380) at /usr/local/app/soft/php-5.4.5/main/main.c:2346
\#11 0x00002aaaab094955 in php_module_shutdown_wrapper (sapi_globals=<value optimized out>) at /usr/local/app/soft/php-5.4.5/main/main.c:2314
\#12 0x00002aaaab1b5331 in php_apache_child_shutdown (tmp=<value optimized out>) at /usr/local/app/soft/php-5.4.5/sapi/apache2handler/sapi_apache2.c:398
\#13 0x00002b9033340aed in run_cleanups (cref=0x5f3398) at memory/unix/apr_pools.c:2346
\#14 0x00002b903334156e in apr_pool_destroy (pool=0x5f3378) at memory/unix/apr_pools.c:809
\#15 0x000000000046e7ee in clean_child_exit (code=0) at worker.c:350
\#16 0x000000000046ea41 in child_main (child_num_arg=<value optimized out>) at worker.c:1292
\#17 0x000000000046ec21 in make_child (s=0x5b4d38, slot=0) at worker.c:1341
\#18 0x000000000046f822 in ap_mpm_run (_pconf=<value optimized out>, plog=<value optimized out>, s=<value optimized out>) at worker.c:1560
\#19 0x000000000042479d in main (argc=3, argv=0x7fff77d48d08) at main.c:753
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