[LTP] [PATCH 08/14] Fix Hugepages Allocate Hugepages only if available to Hugeshmat01

[Subrata M. <su...@li...>]

Signed-Off-By: Subrata Modak<su...@li...>,
--
diff -uprN
ltp-intermediate-20090121.orig/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat01.c ltp-intermediate-20090121/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat01.c
---
ltp-intermediate-20090121.orig/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat01.c 2009-01-23 11:26:46.000000000 +0530
+++
ltp-intermediate-20090121/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat01.c 2009-01-23 11:37:59.000000000 +0530
@@ -57,10 +57,12 @@
  */

#include "ipcshm.h"
+#include "system_specific_hugepages_info.h"

char *TCID = "hugeshmat01";
int TST_TOTAL = 3;
extern int Tst_count;
+unsigned long huge_pages_shm_to_be_allocated;

#define CASE0 10 /* values to write into the shared */
#define CASE1 20 /* memory location.    */
@@ -102,6 +104,11 @@ int main(int ac, char **av)
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
}

+        if ( get_no_of_hugepages() <= 0 || hugepages_size() <= 0 ) 
+             tst_brkm(TBROK, cleanup, "Test cannot be continued owning
to sufficient availability of Hugepages on the system");
+        else              
+             huge_pages_shm_to_be_allocated = ( get_no_of_hugepages() *
hugepages_size() * 1024) / 2 ;
+
setup(); /* global setup */

/* The following loop checks looping state if -i option given */
@@ -176,7 +183,7 @@ check_functionality(int i)
}

/* check the size of the segment */
- if (buf.shm_segsz != HUGE_SHM_SIZE) {
+ if (buf.shm_segsz != huge_pages_shm_to_be_allocated) {
tst_resm(TFAIL, "segment size is incorrect");
return;
}
@@ -251,7 +258,7 @@ setup(void)
shmkey = getipckey();

/* create a shared memory resource with read and write permissions */
- if ((shm_id_1 = shmget(shmkey++, HUGE_SHM_SIZE, SHM_HUGETLB | SHM_RW |
IPC_CREAT |
+ if ((shm_id_1 = shmget(shmkey++, huge_pages_shm_to_be_allocated,
SHM_HUGETLB | SHM_RW | IPC_CREAT |
     IPC_EXCL)) == -1) {
tst_brkm(TBROK, cleanup, "Failed to create shared memory "
"resource 1 in setup()");


Regards--
Subrata