Hello there,
When reading the source code of tcp_sendmsg(), I have
trouble understanding the part of processing cached
pages (partially quoted as following).
...
} else {
int merge = 0;
int i = skb_shinfo(skb)->nr_frags;
struct page *page = TCP_PAGE(sk);
int off = TCP_OFF(sk);
...
I know that data may be stored in the cached pages of
the socket, but I don't knwo how this scheme works,
and when is data stored in cached pages. Could anyone
help? or tell me where I can get information about
this?
Thanks,
Blusea
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