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Merge branch 'akpm' (patches from Andrew)

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Merge second patchbomb from Andrew Morton:

 - the rest of MM

 - various misc bits

 - add ability to run /sbin/reboot at reboot time

 - printk/vsprintf changes

 - fiddle with seq_printf() return value

* akpm: (114 commits)
  parisc: remove use of seq_printf return value
  lru_cache: remove use of seq_printf return value
  tracing: remove use of seq_printf return value
  cgroup: remove use of seq_printf return value
  proc: remove use of seq_printf return value
  s390: remove use of seq_printf return value
  cris fasttimer: remove use of seq_printf return value
  cris: remove use of seq_printf return value
  openrisc: remove use of seq_printf return value
  ARM: plat-pxa: remove use of seq_printf return value
  nios2: cpuinfo: remove use of seq_printf return value
  microblaze: mb: remove use of seq_printf return value
  ipc: remove use of seq_printf return value
  rtc: remove use of seq_printf return value
  power: wakeup: remove use of seq_printf return value
  x86: mtrr: if: remove use of seq_printf return value
  linux/bitmap.h: improve BITMAP_{LAST,FIRST}_WORD_MASK
  MAINTAINERS: CREDITS: remove Stefano Brivio from B43
  .mailmap: add Ricardo Ribalda
  CREDITS: add Ricardo Ribalda Delgado
  ...
This commit is contained in:
Linus Torvalds
2015-04-15 16:39:15 -07:00
parent e7c8241243 e693d73c20
commit eea3a00264
136 changed files with 3273 additions and 1808 deletions
Download Patch File Download Diff File Expand all files Collapse all files

90
fs/hugetlbfs/inode.c
View File

@@ -48,9 +48,10 @@ struct hugetlbfs_config {
kuid_t uid;
kgid_t gid;
umode_t mode;
long nr_blocks;
long max_hpages;
long nr_inodes;
struct hstate *hstate;
long min_hpages;
};
struct hugetlbfs_inode_info {
@@ -68,7 +69,7 @@ int sysctl_hugetlb_shm_group;
enum {
Opt_size, Opt_nr_inodes,
Opt_mode, Opt_uid, Opt_gid,
Opt_pagesize,
Opt_pagesize, Opt_min_size,
Opt_err,
};
@@ -79,6 +80,7 @@ static const match_table_t tokens = {
{Opt_uid, "uid=%u"},
{Opt_gid, "gid=%u"},
{Opt_pagesize, "pagesize=%s"},
{Opt_min_size, "min_size=%s"},
{Opt_err, NULL},
};
@@ -729,14 +731,38 @@ static const struct super_operations hugetlbfs_ops = {
.show_options = generic_show_options,
};
enum { NO_SIZE, SIZE_STD, SIZE_PERCENT };
/*
* Convert size option passed from command line to number of huge pages
* in the pool specified by hstate. Size option could be in bytes
* (val_type == SIZE_STD) or percentage of the pool (val_type == SIZE_PERCENT).
*/
static long long
hugetlbfs_size_to_hpages(struct hstate *h, unsigned long long size_opt,
int val_type)
{
if (val_type == NO_SIZE)
return -1;
if (val_type == SIZE_PERCENT) {
size_opt <<= huge_page_shift(h);
size_opt *= h->max_huge_pages;
do_div(size_opt, 100);
}
size_opt >>= huge_page_shift(h);
return size_opt;
}
static int
hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
{
char *p, *rest;
substring_t args[MAX_OPT_ARGS];
int option;
unsigned long long size = 0;
enum { NO_SIZE, SIZE_STD, SIZE_PERCENT } setsize = NO_SIZE;
unsigned long long max_size_opt = 0, min_size_opt = 0;
int max_val_type = NO_SIZE, min_val_type = NO_SIZE;
if (!options)
return 0;
@@ -774,10 +800,10 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
/* memparse() will accept a K/M/G without a digit */
if (!isdigit(*args[0].from))
goto bad_val;
size = memparse(args[0].from, &rest);
setsize = SIZE_STD;
max_size_opt = memparse(args[0].from, &rest);
max_val_type = SIZE_STD;
if (*rest == '%')
setsize = SIZE_PERCENT;
max_val_type = SIZE_PERCENT;
break;
}
@@ -800,6 +826,17 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
break;
}
case Opt_min_size: {
/* memparse() will accept a K/M/G without a digit */
if (!isdigit(*args[0].from))
goto bad_val;
min_size_opt = memparse(args[0].from, &rest);
min_val_type = SIZE_STD;
if (*rest == '%')
min_val_type = SIZE_PERCENT;
break;
}
default:
pr_err("Bad mount option: \"%s\"\n", p);
return -EINVAL;
@@ -807,15 +844,22 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
}
}
/* Do size after hstate is set up */
if (setsize > NO_SIZE) {
struct hstate *h = pconfig->hstate;
if (setsize == SIZE_PERCENT) {
size <<= huge_page_shift(h);
size *= h->max_huge_pages;
do_div(size, 100);
}
pconfig->nr_blocks = (size >> huge_page_shift(h));
/*
* Use huge page pool size (in hstate) to convert the size
* options to number of huge pages. If NO_SIZE, -1 is returned.
*/
pconfig->max_hpages = hugetlbfs_size_to_hpages(pconfig->hstate,
max_size_opt, max_val_type);
pconfig->min_hpages = hugetlbfs_size_to_hpages(pconfig->hstate,
min_size_opt, min_val_type);
/*
* If max_size was specified, then min_size must be smaller
*/
if (max_val_type > NO_SIZE &&
pconfig->min_hpages > pconfig->max_hpages) {
pr_err("minimum size can not be greater than maximum size\n");
return -EINVAL;
}
return 0;
@@ -834,12 +878,13 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
save_mount_options(sb, data);
config.nr_blocks = -1; /* No limit on size by default */
config.max_hpages = -1; /* No limit on size by default */
config.nr_inodes = -1; /* No limit on number of inodes by default */
config.uid = current_fsuid();
config.gid = current_fsgid();
config.mode = 0755;
config.hstate = &default_hstate;
config.min_hpages = -1; /* No default minimum size */
ret = hugetlbfs_parse_options(data, &config);
if (ret)
return ret;
@@ -853,8 +898,15 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
sbinfo->max_inodes = config.nr_inodes;
sbinfo->free_inodes = config.nr_inodes;
sbinfo->spool = NULL;
if (config.nr_blocks != -1) {
sbinfo->spool = hugepage_new_subpool(config.nr_blocks);
/*
* Allocate and initialize subpool if maximum or minimum size is
* specified. Any needed reservations (for minimim size) are taken
* taken when the subpool is created.
*/
if (config.max_hpages != -1 || config.min_hpages != -1) {
sbinfo->spool = hugepage_new_subpool(config.hstate,
config.max_hpages,
config.min_hpages);
if (!sbinfo->spool)
goto out_free;
}