[lkml]   [2001]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1
On Tue, 9 Jan 2001, Ingo Molnar wrote:

> then you'll love the zerocopy patch :-) Just use sendfile() or specify
> MSG_NOCOPY to sendmsg(), and you'll see effective memory-to-card
> DMA-and-checksumming on cards that support it.

I'm confused.

In user space, how do you know when its safe to reuse the buffer that was
handed to sendmsg() with the MSG_NOCOPY flag? Or does sendmsg() with that
flag block until the buffer isn't needed by the kernel any more? If it
does block, doesn't that defeat the use of non-blocking I/O?


Dave Zarzycki

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:28    [W:0.088 / U:0.164 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site