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Try to fetch thread mailbox address in page fault trap, so when thread

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blocks in page fault hanlder, and upcall thread can be scheduled. It is
useful if process is doing lots of mmap based I/O.
This commit is contained in:
davidxu 2003-10-30 02:55:43 +00:00
parent 8e63ac0e38
commit 91407731e5
2 changed files with 5 additions and 1 deletions
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3
sys/i386/i386/trap.c
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@ -315,6 +315,9 @@ trap(frame)
break;
case T_PAGEFLT: /* page fault */
if (td->td_flags & TDF_SA)
thread_user_enter(p, td);
i = trap_pfault(&frame, TRUE, eva);
#if defined(I586_CPU) && !defined(NO_F00F_HACK)
if (i == -2) {

3
sys/kern/kern_sig.c
View File

@ -1498,7 +1498,8 @@ trapsignal(struct thread *td, int sig, u_long code)
p = td->td_proc;
if (td->td_flags & TDF_SA) {
thread_user_enter(p, td);
if (td->td_mailbox == NULL)
thread_user_enter(p, td);
PROC_LOCK(p);
if (td->td_mailbox) {
SIGDELSET(td->td_sigmask, sig);