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view docs/xml/change_log_conf.xml @ 5970:74edc0ccf27a

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Core: fixed a race resulting in extra sem_post()'s. The mtx->wait counter was not decremented if we were able to obtain the lock right after incrementing it. This resulted in unneeded sem_post() calls, eventually leading to EOVERFLOW errors being logged, "sem_post() failed while wake shmtx (75: Value too large for defined data type)". To close the race, mtx->wait is now decremented if we obtain the lock right after incrementing it in ngx_shmtx_lock(). The result can become -1 if a concurrent ngx_shmtx_unlock() decrements mtx->wait before the added code does. However, that only leads to one extra iteration in the next call of ngx_shmtx_lock().
author Roman Arutyunyan <arut@nginx.com>
date Wed, 04 Feb 2015 16:22:43 +0300
parents 76bc29f06168
children
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<?xml version="1.0" ?>
<!DOCTYPE configuration SYSTEM "../dtd/change_log_conf.dtd" >

<configuration>

<length>76</length>

<start>    *) </start>
<indent>       </indent>

<changes lang="ru">
    <title>Изменения в </title>
    <length>66</length>

    <bugfix>Исправление</bugfix>
    <feature>Добавление</feature>
    <change>Изменение</change>
    <security>Безопасность</security>
    <workaround>Изменение</workaround>
</changes>

<changes lang="en">
    <title>Changes with </title>
    <length>65</length>

    <bugfix>Bugfix</bugfix>
    <feature>Feature</feature>
    <change>Change</change>
    <security>Security</security>
    <workaround>Workaround</workaround>

    <month> Jan </month>
    <month> Feb </month>
    <month> Mar </month>
    <month> Apr </month>
    <month> May </month>
    <month> Jun </month>
    <month> Jul </month>
    <month> Aug </month>
    <month> Sep </month>
    <month> Oct </month>
    <month> Nov </month>
    <month> Dec </month>

</changes>

</configuration>