From: Randy Dunlap <rdunlap@infradead.org>
To: horseriver <horserivers@gmail.com>
Cc: netdev@vger.kernel.org
Subject: Re: when and where does ep_poll_callback be called ?
Date: Mon, 14 Jan 2013 08:35:29 -0800 [thread overview]
Message-ID: <50F433D1.6070809@infradead.org> (raw)
In-Reply-To: <20130114011115.GG2743@debian.localdomain>
On 01/13/13 17:11, horseriver wrote:
> hi:
>
>
> I'm studying the epoll module , I can not find ep_poll_callback be called somewhere .
It's right there in fs/eventpoll.c:
/*
* This is the callback that is used to add our wait queue to the
* target file wakeup lists.
*/
static void ep_ptable_queue_proc(struct file *file, wait_queue_head_t *whead,
poll_table *pt)
{
struct epitem *epi = ep_item_from_epqueue(pt);
struct eppoll_entry *pwq;
if (epi->nwait >= 0 && (pwq = kmem_cache_alloc(pwq_cache, GFP_KERNEL))) {
>>>>> init_waitqueue_func_entry(&pwq->wait, ep_poll_callback);
pwq->whead = whead;
pwq->base = epi;
add_wait_queue(whead, &pwq->wait);
list_add_tail(&pwq->llink, &epi->pwqlist);
epi->nwait++;
--
~Randy
next prev parent reply other threads:[~2013-01-14 16:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-14 1:11 when and where does ep_poll_callback be called ? horseriver
2013-01-14 16:35 ` Randy Dunlap [this message]
2013-01-14 7:52 ` horseriver
2013-03-13 5:00 ` Eric Dumazet
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