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hugefileobj: rewrite page allocation/handling

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* manage pages by an array
* fix mmap of fd created by memfd_create() populates the map
* refactor pgsize and pgshift handling

Change-Id: Icaf015b10afc35f2b95f93059adf1a1b6b92e14e
refs: #1475
This commit is contained in:
Balazs Gerofi
2020-04-20 19:51:37 +09:00
committed by Masamichi Takagi
parent c3c0b7197f
commit 2e2e973d78
3 changed files with 160 additions and 162 deletions
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13
executer/kernel/mcctrl/syscall.c
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@ -44,6 +44,7 @@
#include <linux/spinlock.h>
#include <linux/mount.h>
#include <linux/kdev_t.h>
#include <linux/hugetlb.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/io.h>
@ -874,6 +875,7 @@ struct pager_create_result {
int maxprot;
uint32_t flags;
size_t size;
int pgshift;
char path[PATH_MAX];
};
@ -935,6 +937,7 @@ static int pager_req_create(ihk_os_t os, int fd, uintptr_t result_pa)
struct kstat st;
int mf_flags = 0;
unsigned long irqflags;
int pgshift = 0;
dprintk("pager_req_create(%d,%lx)\n", fd, (long)result_pa);
@ -999,13 +1002,14 @@ static int pager_req_create(ihk_os_t os, int fd, uintptr_t result_pa)
}
if (inode->i_op == mcctrl_hugetlbfs_inode_operations) {
struct hstate *h = hstate_file(file);
pgshift = PAGE_SHIFT + huge_page_order(h);
mf_flags = MF_HUGETLBFS;
/* pager is used as handle id on mckernel side, use inode */
pager = (void *)st.ino;
/* retrofit blksize in resp as well through st.size field;
* the actual file size is not used
*/
st.size = st.blksize;
/* file size is not used */
st.size = 0;
goto out_reply;
}
@ -1092,6 +1096,7 @@ out_reply:
resp->maxprot = maxprot;
resp->flags = mf_flags;
resp->size = st.size;
resp->pgshift = pgshift;
error = pager_get_path(file, resp->path);