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Unpause requests (to FS) can be generated in parallel to other requests.

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This commit is contained in:
Philip Homburg 2006-05-15 12:06:19 +00:00
parent f0186f4179
commit c9ff3994f1
3 changed files with 33 additions and 14 deletions
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27
servers/pm/main.c
View file

@ -216,6 +216,7 @@ PRIVATE void pm_init()
tmr_inittimer(&rmp->mp_timer);
rmp->mp_fs_call= PM_IDLE;
rmp->mp_fs_call2= PM_IDLE;
}
/* Build the set of signals which cause core dumps, and the set of signals
@ -518,6 +519,8 @@ PRIVATE void send_work()
for (rmp= mproc; rmp < &mproc[NR_PROCS]; rmp++)
{
call= rmp->mp_fs_call;
if (call == PM_IDLE)
call= rmp->mp_fs_call2;
if (call == PM_IDLE)
continue;
switch(call)
@ -605,6 +608,20 @@ PRIVATE void send_work()
break;
case PM_UNPAUSE:
m.m_type= call;
m.PM_UNPAUSE_PROC= rmp->mp_endpoint;
/* FS does not reply */
rmp->mp_fs_call2= PM_IDLE;
/* Ask the kernel to deliver the signal */
r= sys_sigsend(rmp->mp_endpoint,
&rmp->mp_sigmsg);
if (r != OK)
panic(__FILE__,"sys_sigsend failed",r);
break;
case PM_UNPAUSE_TR:
m.m_type= call;
m.PM_UNPAUSE_PROC= rmp->mp_endpoint;
@ -612,15 +629,6 @@ PRIVATE void send_work()
/* FS does not reply */
rmp->mp_fs_call= PM_IDLE;
if (call == PM_UNPAUSE)
{
/* Ask the kernel to deliver the signal */
r= sys_sigsend(rmp->mp_endpoint,
&rmp->mp_sigmsg);
if (r != OK)
panic(__FILE__,"sys_sigsend failed",r);
}
break;
case PM_EXEC:
@ -675,6 +683,7 @@ PRIVATE void send_work()
if (m.m_type != PM_IDLE)
{
if (rmp->mp_fs_call == PM_IDLE &&
rmp->mp_fs_call2 == PM_IDLE &&
(rmp->mp_flags & PM_SIG_PENDING))
{
rmp->mp_flags &= ~PM_SIG_PENDING;

3
servers/pm/mproc.h
View file

@ -54,7 +54,8 @@ EXTERN struct mproc {
message mp_reply; /* reply message to be sent to one */
/* Communication with FS */
int mp_fs_call;
int mp_fs_call; /* Record the call for normal system calls */
int mp_fs_call2; /* Record the call for signals */
char *mp_exec_path; /* Path of executable */
vir_bytes mp_exec_path_len; /* Length of path (including nul) */
char *mp_exec_frame; /* Arguments */

17
servers/pm/signal.c
View file

@ -420,7 +420,7 @@ int signo; /* signal to send to process (1 to _NSIG) */
signo, (rmp->mp_flags & ZOMBIE) ? "zombie" : "dead", slot);
panic(__FILE__,"", NO_NUM);
}
if (rmp->mp_fs_call != PM_IDLE)
if (rmp->mp_fs_call != PM_IDLE || rmp->mp_fs_call2 != PM_IDLE)
{
sigaddset(&rmp->mp_sigpending, signo);
rmp->mp_flags |= PM_SIG_PENDING;
@ -661,9 +661,18 @@ int for_trace; /* for tracing */
}
/* Process is not hanging on an PM call. Ask FS to take a look. */
if (rmp->mp_fs_call != PM_IDLE)
panic("pm", "unpause: not idle", rmp->mp_fs_call);
rmp->mp_fs_call= (for_trace ? PM_UNPAUSE_TR : PM_UNPAUSE);
if (for_trace)
{
if (rmp->mp_fs_call != PM_IDLE)
panic( __FILE__, "unpause: not idle", rmp->mp_fs_call);
rmp->mp_fs_call= PM_UNPAUSE_TR;
}
else
{
if (rmp->mp_fs_call2 != PM_IDLE)
panic( __FILE__, "unpause: not idle", rmp->mp_fs_call2);
rmp->mp_fs_call2= PM_UNPAUSE;
}
r= notify(FS_PROC_NR);
if (r != OK) panic("pm", "unpause: unable to notify FS", r);
}