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Add the function md_assert_nopreempt(), which is a very consistent

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function on the possibility of a thread to not preempt.

As this function is very tied to x86 (interrupts disabled checkings)
it is not intended to be used in MI code.
This commit is contained in:
Attilio Rao 2011-04-30 23:12:37 +00:00
parent 9734077245
commit f1edea81ac
5 changed files with 50 additions and 0 deletions
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16
sys/amd64/amd64/mp_machdep.c
View File

@ -1428,6 +1428,22 @@ cpususpend_handler(void)
intr_restore(rf);
}
void
md_assert_nopreempt(void)
{
#ifdef INVARIANTS
struct thread *td;
register_t rflags;
td = curthread;
rflags = read_rflags();
if ((rflags & PSL_I) != 0 && td->td_critnest <= 0)
panic("Preemption still allowed, thread %s\n",
(td->td_pinned <= 0) ? "not pinned" : "pinned");
#endif
}
/*
* This is called once the rest of the system is up and running and we're
* ready to let the AP's out of the pen.

1
sys/amd64/include/smp.h
View File

@ -64,6 +64,7 @@ void ipi_bitmap_handler(struct trapframe frame);
void ipi_cpu(int cpu, u_int ipi);
int ipi_nmi_handler(void);
void ipi_selected(cpumask_t cpus, u_int ipi);
void md_assert_nopreempt(void);
u_int mp_bootaddress(u_int);
int mp_grab_cpu_hlt(void);
void smp_cache_flush(void);

16
sys/i386/i386/mp_machdep.c
View File

@ -1486,6 +1486,22 @@ cpustop_handler(void)
}
}
void
md_assert_nopreempt(void)
{
#ifdef INVARIANTS
struct thread *td;
register_t rflags;
td = curthread;
rflags = read_rflags();
if ((rflags & PSL_I) != 0 && td->td_critnest <= 0)
panic("Preemption still allowed, thread %s\n",
(td->td_pinned <= 0) ? "not pinned" : "pinned");
#endif
}
/*
* This is called once the rest of the system is up and running and we're
* ready to let the AP's out of the pen.

1
sys/i386/include/smp.h
View File

@ -65,6 +65,7 @@ void ipi_bitmap_handler(struct trapframe frame);
void ipi_cpu(int cpu, u_int ipi);
int ipi_nmi_handler(void);
void ipi_selected(cpumask_t cpus, u_int ipi);
void md_assert_nopreempt(void);
u_int mp_bootaddress(u_int);
int mp_grab_cpu_hlt(void);
void smp_cache_flush(void);

16
sys/i386/xen/mp_machdep.c
View File

@ -1241,6 +1241,22 @@ cpustop_handler(void)
}
}
void
md_assert_nopreempt(void)
{
#ifdef INVARIANTS
struct thread *td;
register_t rflags;
td = curthread;
rflags = read_rflags();
if ((rflags & PSL_I) != 0 && td->td_critnest <= 0)
panic("Preemption still allowed, thread %s\n",
(td->td_pinned <= 0) ? "not pinned" : "pinned");
#endif
}
/*
* This is called once the rest of the system is up and running and we're
* ready to let the AP's out of the pen.