smp-patch-06 is now ready.
http://www.backplane.com/FreeBSD4/
http://www.backplane.com/FreeBSD4/smp-patch-06.diff
Bruce, I'd appreciate a quick review of my solution to the AST issue.
Search for 'syscall_ast_exit' in i386/i386/exception.s after patching.
I moved astpending to the per-cpu structure and made it a u_int. I then
test it in the syscall code and, if non-zero, it obtains the MP lock,
pushes the dummy state, and jumps to _doreti.
(This patch also adds lots of comments to the assembly).
I am also in need of some C code to test it. I *think* the below code
will test it, but I'm not sure. Bruce?
-Matt
#include <sys/types.h>
#include <sys/errno.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
int
main(int ac, char **av)
{
signal(SIGALRM, (void *)-1);
alarm(1);
for (;;)
;
}
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