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Update global_page_state() support for 2.6.29 kernels.

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Basically everything we need to monitor the global memory state of
the system is now cleanly available via global_page_state().  The
problem is that this interface is still fairly recent, and there
has been one change in the page state enum which we need to handle.
These changes basically boil down to the following:
- If global_page_state() is available we should use it.  Several
  autoconf checks have been added to detect the correct enum names.
- If global_page_state() is not available check to see if
  get_zone_counts() symbol is available and use that.
- If the get_zone_counts() symbol is not exported we have no choice
  be to dynamically aquire it at load time.  This is an absolute
  last resort for old kernel which we don't want to patch to
  cleanly export the symbol.
This commit is contained in:
Brian Behlendorf
2009-07-28 15:06:42 -07:00
parent 6b09f73939
commit 6ae7fef5b9
6 changed files with 1324 additions and 195 deletions
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module/splat/splat-kmem.c
+24 -21
View File
@@ -1045,16 +1045,17 @@ splat_kmem_test11(struct file *file, void *arg)
static int
splat_kmem_test12(struct file *file, void *arg)
{
ssize_t alloc1, free1, total1;
ssize_t alloc2, free2, total2;
size_t alloc1, free1, total1;
size_t alloc2, free2, total2;
int size = 8*1024*1024;
void *ptr;
alloc1 = vmem_size(NULL, VMEM_ALLOC);
free1 = vmem_size(NULL, VMEM_FREE);
total1 = vmem_size(NULL, VMEM_ALLOC | VMEM_FREE);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Vmem alloc=%d free=%d "
"total=%d\n", (int)alloc1, (int)free1, (int)total1);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Vmem alloc=%lu "
"free=%lu total=%lu\n", (unsigned long)alloc1,
(unsigned long)free1, (unsigned long)total1);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Alloc %d bytes\n", size);
ptr = vmem_alloc(size, KM_SLEEP);
@@ -1067,42 +1068,44 @@ splat_kmem_test12(struct file *file, void *arg)
alloc2 = vmem_size(NULL, VMEM_ALLOC);
free2 = vmem_size(NULL, VMEM_FREE);
total2 = vmem_size(NULL, VMEM_ALLOC | VMEM_FREE);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Vmem alloc=%d free=%d "
"total=%d\n", (int)alloc2, (int)free2, (int)total2);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Vmem alloc=%lu "
"free=%lu total=%lu\n", (unsigned long)alloc2,
(unsigned long)free2, (unsigned long)total2);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Free %d bytes\n", size);
vmem_free(ptr, size);
if (alloc2 < (alloc1 + size - (size / 100)) ||
alloc2 > (alloc1 + size + (size / 100))) {
splat_vprint(file, SPLAT_KMEM_TEST12_NAME,
"Failed VMEM_ALLOC size: %d != %d+%d (+/- 1%%)\n",
(int)alloc2, (int)alloc1, size);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Failed "
"VMEM_ALLOC size: %lu != %lu+%d (+/- 1%%)\n",
(unsigned long)alloc2,(unsigned long)alloc1,size);
return -ERANGE;
}
if (free2 < (free1 - size - (size / 100)) ||
free2 > (free1 - size + (size / 100))) {
splat_vprint(file, SPLAT_KMEM_TEST12_NAME,
"Failed VMEM_FREE size: %d != %d-%d (+/- 1%%)\n",
(int)free2, (int)free1, size);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Failed "
"VMEM_FREE size: %lu != %lu-%d (+/- 1%%)\n",
(unsigned long)free2, (unsigned long)free1, size);
return -ERANGE;
}
if (total1 != total2) {
splat_vprint(file, SPLAT_KMEM_TEST12_NAME,
"Failed VMEM_ALLOC | VMEM_FREE not constant: "
"%d != %d\n", (int)total2, (int)total1);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME, "Failed "
"VMEM_ALLOC | VMEM_FREE not constant: "
"%lu != %lu\n", (unsigned long)total2,
(unsigned long)total1);
return -ERANGE;
}
splat_vprint(file, SPLAT_KMEM_TEST12_NAME,
"VMEM_ALLOC within tolerance: ~%d%% (%d/%d)\n",
(int)(((alloc1 + size) - alloc2) * 100 / size),
(int)((alloc1 + size) - alloc2), size);
"VMEM_ALLOC within tolerance: ~%ld%% (%ld/%d)\n",
(long)abs(alloc1 + (long)size - alloc2) * 100 / (long)size,
(long)abs(alloc1 + (long)size - alloc2), size);
splat_vprint(file, SPLAT_KMEM_TEST12_NAME,
"VMEM_FREE within tolerance: ~%d%% (%d/%d)\n",
(int)(((free1 - size) - free2) * 100 / size),
(int)((free1 - size) - free2), size);
"VMEM_FREE within tolerance: ~%ld%% (%ld/%d)\n",
(long)abs((free1 - (long)size) - free2) * 100 / (long)size,
(long)abs((free1 - (long)size) - free2), size);
return 0;
}