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Affinity shared memory area must be at least a page 

If the system page size is greater than 4kB (or 32kB in the case of
BIGNUMA), then the affinity code will fail to initialise.

Ensure the shared memory area is at least one page in size.
This commit is contained in:
Anton Blanchard 2016-03-24 06:17:06 +00:00
parent 8519e4ed9f
commit 749e605e9d
1 changed files with 11 additions and 11 deletions
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22
driver/others/init.c
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@ -555,24 +555,24 @@ static inline int is_dead(int id) {
} }
static void open_shmem(void) { static void open_shmem(void) {
int shm_size = 4096;
#if defined(BIGNUMA)
// raised to 32768, enough for 128 nodes and 1024 cups
shm_size = 32*1024;
#endif
// needs to be at least one page
shm_size = MAX(getpagesize(), shm_size);
int try = 0; int try = 0;
do { do {
#if defined(BIGNUMA) shmid = shmget(SH_MAGIC, shm_size, 0666);
// raised to 32768, enough for 128 nodes and 1024 cups
shmid = shmget(SH_MAGIC, 32768, 0666);
#else
shmid = shmget(SH_MAGIC, 4096, 0666);
#endif
if (shmid == -1) { if (shmid == -1) {
#if defined(BIGNUMA) shmid = shmget(SH_MAGIC, shm_size, IPC_CREAT | 0666);
shmid = shmget(SH_MAGIC, 32768, IPC_CREAT | 0666);
#else
shmid = shmget(SH_MAGIC, 4096, IPC_CREAT | 0666);
#endif
} }
try ++; try ++;