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254125 |
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09-Aug-2013 |
kib |
MFC r253527:
Move the convert_sigevent32() utility function into freebsd32_misc.c
for consumption outside the vfs_aio.c.
For SIGEV_THREAD_ID and SIGEV_SIGNAL notification delivery methods,
also copy in the sigev_value, since librt event pumping loop compares
note generation number with the value passed through sigev_value.
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| #
232290 |
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29-Feb-2012 |
davidxu |
MFC 230857:
If multiple threads call kevent() to get AIO events on same kqueue fd,
it is possible that a single AIO event will be reported to multiple
threads, it is not threading friendly, and the existing API can not
control this behavior.
Allocate a kevent flags field sigev_notify_kevent_flags for AIO event
notification in sigevent, and allow user to pass EV_CLEAR, EV_DISPATCH
or EV_ONESHOT to AIO kernel code, user can control whether the event
should be cleared once it is retrieved by a thread. This change should
be comptaible with existing application, because the field should have
already been zero-filled, and no additional action will be taken by
kernel.
PR: kern/156567
MFC 231006:
Add 32-bit compat code for AIO kevent flags introduced in revision 230857.
MFC 231724:
Add notes about sigev_notify_kevent_flags introduced in revision 230857
which enables thread-friendly polling on same fd for AIO events.
Reviewed by: delphij
MFC 231777:
Bump .Dd date for previous revision.
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