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pager_req_create(): prefetch for MPI library and zerofill for shm

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This commit is contained in:
Balazs Gerofi
2016-12-17 19:51:50 +09:00
parent bce10e11e4
commit 56ed726a88
1 changed files with 26 additions and 0 deletions
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26
executer/kernel/mcctrl/syscall.c
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@ -839,6 +839,32 @@ static int pager_req_create(ihk_os_t os, int fd, uintptr_t result_pa)
list_add(&newpager->list, &pager_list);
pager = newpager;
newpager = NULL;
/* Intel MPI library and shared memory "prefetch" */
{
char *pathbuf, *fullpath;
pathbuf = kmalloc(PATH_MAX, GFP_TEMPORARY);
if (pathbuf) {
fullpath = d_path(&file->f_path, pathbuf, PATH_MAX);
if (!IS_ERR(fullpath)) {
if (!strncmp("/dev/shm/Intel_MPI", fullpath, 18)) {
//mf_flags = (MF_PREFETCH | MF_ZEROFILL);
mf_flags = (MF_ZEROFILL);
dprintk("%s: filename: %s, zerofill\n",
__FUNCTION__, fullpath);
}
else if (strstr(fullpath, "libmpi") != NULL) {
mf_flags = MF_PREFETCH;
dprintk("%s: filename: %s, prefetch\n",
__FUNCTION__, fullpath);
}
}
kfree(pathbuf);
}
}
break;
}