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Add back these constants, but this time make sure we won't divide by 0 or

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Tue Oct 11 22:40:24 2005  Soeren Sandmann  <sandmann@redhat.com>

        * module/sysprof-module.c (SAMPLES_PER_SECOND): Add back these
        constants, but this time make sure we won't divide by 0 or
        anything like that.
This commit is contained in:
Soeren Sandmann
2005-10-12 02:40:29 +00:00
committed by Søren Sandmann Pedersen
parent e5987543b0
commit a49ae59709
2 changed files with 13 additions and 2 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Tue Oct 11 22:40:24 2005 Soeren Sandmann <sandmann@redhat.com>
* module/sysprof-module.c (SAMPLES_PER_SECOND): Add back these
constants, but this time make sure we won't divide by 0 or
anything like that.
Mon Oct 10 22:49:03 2005 Soeren Sandmann <sandmann@redhat.com> Mon Oct 10 22:49:03 2005 Soeren Sandmann <sandmann@redhat.com>
* module/sysprof-module.c: Delete lots of commented-out code. * module/sysprof-module.c: Delete lots of commented-out code.

9
module/sysprof-module.c
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@ -70,6 +70,9 @@ DECLARE_WAIT_QUEUE_HEAD (wait_for_exit);
# error Sysprof only supports the i386 and x86-64 architectures # error Sysprof only supports the i386 and x86-64 architectures
#endif #endif
#define SAMPLES_PER_SECOND 250
#define INTERVAL ((HZ <= SAMPLES_PER_SECOND)? 1 : (HZ / SAMPLES_PER_SECOND))
typedef struct userspace_reader userspace_reader; typedef struct userspace_reader userspace_reader;
struct userspace_reader struct userspace_reader
{ {
@ -217,8 +220,7 @@ static int pages_present(StackFrame * head)
} }
#endif /* CONFIG_X86_4G */ #endif /* CONFIG_X86_4G */
static int static int timer_notify (struct pt_regs *regs)
timer_notify (struct pt_regs *regs)
{ {
#ifdef CONFIG_HIGHMEM #ifdef CONFIG_HIGHMEM
# define START_OF_STACK 0xFF000000 # define START_OF_STACK 0xFF000000
@ -231,6 +233,9 @@ timer_notify (struct pt_regs *regs)
int i; int i;
int is_user; int is_user;
if ((++n_samples % INTERVAL) != 0)
return 0;
is_user = user_mode(regs); is_user = user_mode(regs);
if (!current || current->pid == 0 || !current->mm) if (!current || current->pid == 0 || !current->mm)