From: gmate.amit@gmail.com (Kumar amit mehta)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Query on skb buffer
Date: Wed, 6 Mar 2013 10:39:13 -0800 [thread overview]
Message-ID: <20130306183913.GA3328@gmail.com> (raw)
My current understanding is that the skb, while being passed along various
layers in linux network stack, will be manipulated majorly, using the
skb->{head|data|tail|end|len} fields.
Suppose that my application (say 'ping') sends a ICMP echo request with a
large packet size of 4k, i.e. $ ping -s 4096 <dest addr>
Now, if alloc_skb(4096, GFP_KERNEL) is the routine that gets called to allocate
the kernel buffer then, how does the kernel manages such prospective memory
allocation failures and how kernel manages large packet requests from the
application.
-Amit
next reply other threads:[~2013-03-06 18:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-06 18:39 Kumar amit mehta [this message]
2013-03-06 19:32 ` Query on skb buffer Valdis.Kletnieks at vt.edu
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