Re: m_devget
Re: m_devget
- Subject: Re: m_devget
- From: Peter Lovell <email@hidden>
- Date: Mon, 4 Apr 2005 16:38:38 -0400
On Apr 4, 2005, at 4:08 PM, Carl Smith wrote:
I want to create a new chain of mbufs, I am using the function
m_devget, my question is, what if I have data larger than 1500 bytes,
say 3000 bytes, can I pass the buffer into m_devget and m_devget will
chain, link out the data correctly or do I have to break up the large
data myself, into 1500 bytes chunks and call m_devget twice?
I hope this is relatively simple question so I can get some response
back from this forum.
If this is not the proper forum for asking this question I would
appreciate some feedback on where I should be asking these questions.
Hi Carl,
Looking at xnu/bsd/kern/uipc.mbuf.c (hint hint) it would appear that it
will break it up for you.
Note that it doesn't wait, and can therefore fail and return zero
(NULL).
In case you don't know, you can also post such questions here (with
probably a better hit rate) ...
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regards.....Peter
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| References: | |
| | >m_devget (From: "Carl Smith" <email@hidden>) |