hey,
I think we need to split the P_* flags and the S* stati between procs
and lwps. This is how i see the P_* flags could be split.
How should we do with the S* status? Introduce PS* or LPS*? Processes
can't sleep anymore, but they could be stopped. Do we want a flag for
that or do we check p_nstopped == p_nthreads?
cheers
simon
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Index: sys/proc.h
===================================================================
RCS file: /cvs/src/sys/sys/proc.h,v
retrieving revision 1.70
diff -u -r1.70 proc.h
--- sys/proc.h 11 Oct 2005 09:59:56 -0000 1.70
+++ sys/proc.h 11 Oct 2005 20:50:11 -0000
@@ -317,8 +317,8 @@
#define P_INMEM 0x00004 /* Loaded into memory. */
#define P_PPWAIT 0x00010 /* Parent is waiting for child to
exec/exit. */
#define P_PROFIL 0x00020 /* Has started profiling. */
-#define P_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
-#define P_SINTR 0x00080 /* Sleep is interruptible. */
+#define LWP_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
+#define LWP_SINTR 0x00080 /* Sleep is interruptible. */
#define P_SUGID 0x00100 /* Had set id privileges since last
exec. */
#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or
swapping. */
#define P_UNUSED00400 0x00400
@@ -331,23 +331,23 @@
/* was P_NOSWAP 0x08000 was: Do not swap upages; p->p_hold */
/* was P_PHYSIO 0x10000 was: Doing physical I/O; use p->p_hold */
-#define P_UPCALLPEND 0x20000 /* an upcall is pending */
+#define LWP_UPCALLPEND 0x20000 /* an upcall is pending */
#define P_SWAPPING 0x40000 /* Process is being swapped. */
#define P_SWAPINREQ 0x80000 /* Swapin request due to wakeup */
/* Marked a kernel thread */
-#define P_ONRUNQ 0x100000 /* on a user scheduling run queue */
-#define P_KTHREADP 0x200000 /* Process is really a kernel thread */
+#define LWP_ONRUNQ 0x100000 /* on a user scheduling run queue */
+#define P_KTHREADP 0x200000 /* Process is really a kernel thread
XXX not used? */
#define P_UNUSED400000 0x400000
-#define P_DEADLKTREAT 0x800000 /* lock aquisition - deadlock
treatment */
+#define LWP_DEADLKTREAT 0x800000 /* lock aquisition - deadlock
treatment XXX not used? */
#define P_JAILED 0x1000000 /* Process is in jail */
-#define P_OLDMASK 0x2000000 /* need to restore mask before pause
*/
-#define P_ALTSTACK 0x4000000 /* have alternate signal stack */
+#define LWP_OLDMASK 0x2000000 /* need to restore mask before pause
*/
+#define LWP_ALTSTACK 0x4000000 /* have alternate signal stack */
#define P_INEXEC 0x8000000 /* Process is in execve(). */
-#define P_PASSIVE_ACQ 0x10000000 /* Passive acquire cpu (see kern_switch) */
-#define P_UPCALLWAIT 0x20000000 /* Wait for upcall or signal */
+#define LWP_PASSIVE_ACQ 0x10000000 /* Passive acquire cpu (see
kern_switch) */
+#define LWP_UPCALLWAIT 0x20000000 /* Wait for upcall or signal */
#ifdef _KERNEL
@@ -371,6 +371,7 @@
* Handy macro for LISTs.
*/
#define FOREACH_PROC_IN_SYSTEM(p) LIST_FOREACH((p), &allproc, p_list)
+#define FOREACH_LWP_IN_PROC(p, lp) LIST_FOREACH((lp), (p)->p_lwps,
lwp_list)
/*
* We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
