Date: Wed, 13 Jan 1999 08:57:13 +1100 From: Bruce Evans <bde@zeta.org.au> To: fenner@parc.xerox.com, jgreco@solaria.sol.net Cc: current@FreeBSD.ORG Subject: Re: Lots of arpresolve: can't allocate llinfo for <addr>rt Message-ID: <199901122157.IAA32727@godzilla.zeta.org.au>
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>getting a bit irritating... I'm using a serial console and during very
>heavy message-spews, the machine seems to "freeze" for seconds at a time
>and I'm pretty sure its because the system is waiting for the 9600 baud
>console to print. I've got a whole different set of complaints about the
>serial console handling, oh well.
Try this patch. ttymsg() can fill up the process table for heavy
message-spews. Serial console handling is relatively perfect :-).
Bruce
diff -c2 ttymsg.c~ ttymsg.c
*** ttymsg.c~ Sat Jul 25 04:51:47 1998
--- ttymsg.c Sat Jul 25 04:52:56 1998
***************
*** 42,45 ****
--- 42,46 ----
#include <sys/types.h>
#include <sys/uio.h>
+ #include <sys/wait.h>
#include <dirent.h>
#include <errno.h>
***************
*** 70,74 ****
register int cnt, fd, left, wret;
struct iovec localiov[7];
! int forked = 0;
if (iovcnt > sizeof(localiov) / sizeof(localiov[0]))
--- 71,92 ----
register int cnt, fd, left, wret;
struct iovec localiov[7];
! int forked = 0, status;
! static pid_t cpid = 0;
! pid_t pid;
!
! /*
! * Don't do anything if a child is still alive. Interleaved
! * output would not be good, and filling the process table with
! * as many children as we can fork before the timeout kills them
! * would be worse. Waiting here also reduces the need to handle
! * SIGCHLD in callers.
! */
! if (cpid) {
! pid = waitpid(cpid, &status, WNOHANG);
! if (pid == cpid || (pid == -1 || errno == ECHILD))
! cpid = 0;
! else
! return (NULL);
! }
if (iovcnt > sizeof(localiov) / sizeof(localiov[0]))
***************
*** 121,125 ****
}
if (errno == EWOULDBLOCK) {
! int cpid, off = 0;
if (forked) {
--- 139,143 ----
}
if (errno == EWOULDBLOCK) {
! int off = 0;
if (forked) {
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