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b3c6fe663b
Current epoll implementation stores udata fields of epoll_event structure in special dynamically-sized table rather than in udata field of backing kevent structure because of 2 reasons: 1. Kevent's udata size is smaller than epoll's on 32-bit archs. 2. Kevent's udata can be clobbered on execution EPOLL_CTL_ADD as kqueue modifies existing event while epoll returns error in this case. After r320043 has introduced four new 64bit user data members (ext[]), we can store epoll udata in one of them and drop aforementioned table. According to kqueue_register() source code ext members are not updated when existing kevent is modified that fixes p.2. As a side effect the patch fixes PR/252582. Reviewed by: trasz MFC after: 1 month Differential revision: https://reviews.freebsd.org/D28169 |
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