Hi,
I'm trying to turn a kernel virtual address into a struct page that I can
then pass to tcp_sendpage().
The kernel virtual address could be {kmalloc(),vmalloc(),kmap()}-ed memory,
and I guarantee that this memory will not be {kfree(),vfree(),kunmap()}-ed
until the socket has done with the page (i.e. all the data has been acked).
I'd have thought that vmalloc_to_page(kvaddr) should give me a page I could
use, since it is walking the page tables to find the pte for 'kvaddr', and
checking that the physical page is present.
However I find I'm sending garbage when I use this method.
Can anyone help me understand?
--Cheers, Eric
---------------------------------------------------- |Eric Barton Barton Software | |9 York Gardens Tel: +44 (117) 330 1575 | |Clifton Mobile: +44 (7909) 680 356 | |Bristol BS8 4LL Fax: call first | |United Kingdom E-Mail: eric@bartonsoftware.com| ---------------------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Oct 23 2002 - 22:00:36 EST