Linus Torvalds wrote:
"sendfile()" in general I think has been a mistake. It's too specialized,
and the interface has always sucked.
Ok, you're right. I will have a look at the pipe buffer stuff.
As Andrew pointed out, it actually
needs to limit the number of buffers in flight partly because otherwise
you have uninterruptible kernel work etc etc.
Hmm, sendfile() uses do_generic_mapping_read() which is calling the
file_send_actor() per page. The actor calls ->sendpage(). I don't see
any situation how this could lead to uninterruptible kernel work when
the sendpage() itself is checking for signals. There are only 2 pages in
flight in this case.
Jan
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