Re: TCP memory pressure question

[David Schwartz <davids@webmaster.com>]

On 22 Nov 2002 12:06:29 +0000, Gianni Tedesco wrote:

>On Thu, 2002-11-21 at 21:34, David Schwartz wrote:

>>    When a Linux machine has reached the tcp_mem limit, what will happen to
>>'write's on non-blocking sockets? Will they block until more TCP memory is
>>available? Will they return an error code? ENOMEM?

>from write(2) man page.

>EAGAIN Non-blocking I/O has been selected using O_NONBLOCK and the write
>would block.

	So this would be a case where 'poll' or 'select' would return a write hit 
for a socket but 'write' would return -1 and set errno to EAGAIN.

	DS