Messages in this thread | | | Date | Mon, 25 Nov 2002 14:36:03 -0800 (PST) | From | Davide Libenzi <> | Subject | Re: [rfc] new poll callback'd wake up hell ... |
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On Mon, 25 Nov 2002, John Myers wrote:
> Davide Libenzi writes: > > 1) Move the wake_up() call done inside the poll callback outside the lock > > You can't. You need to hold the lock over the callback or your callback > could end up accessing a freed epitem.
No, look at the code :
http://www.xmailserver.org/linux-patches/sys_epoll-2.5.49-0.58.diff
The function ep_collect_ready_items() increases the usage count under lock. So the epintem is protected, and the file* cannot desappear because of the read lock on epsem.
- Davide
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