diff options
Diffstat (limited to 'Documentation/vm')
-rw-r--r-- | Documentation/vm/hugetlbpage.txt | 27 | ||||
-rw-r--r-- | Documentation/vm/hwpoison.txt | 2 |
2 files changed, 19 insertions, 10 deletions
diff --git a/Documentation/vm/hugetlbpage.txt b/Documentation/vm/hugetlbpage.txt index 59cbc803aad6..faf077d50d42 100644 --- a/Documentation/vm/hugetlbpage.txt +++ b/Documentation/vm/hugetlbpage.txt @@ -20,19 +20,20 @@ options. The /proc/meminfo file provides information about the total number of persistent hugetlb pages in the kernel's huge page pool. It also displays -information about the number of free, reserved and surplus huge pages and the -default huge page size. The huge page size is needed for generating the -proper alignment and size of the arguments to system calls that map huge page -regions. +default huge page size and information about the number of free, reserved +and surplus huge pages in the pool of huge pages of default size. +The huge page size is needed for generating the proper alignment and +size of the arguments to system calls that map huge page regions. The output of "cat /proc/meminfo" will include lines like: ..... -HugePages_Total: vvv -HugePages_Free: www -HugePages_Rsvd: xxx -HugePages_Surp: yyy -Hugepagesize: zzz kB +HugePages_Total: uuu +HugePages_Free: vvv +HugePages_Rsvd: www +HugePages_Surp: xxx +Hugepagesize: yyy kB +Hugetlb: zzz kB where: HugePages_Total is the size of the pool of huge pages. @@ -47,6 +48,14 @@ HugePages_Surp is short for "surplus," and is the number of huge pages in the pool above the value in /proc/sys/vm/nr_hugepages. The maximum number of surplus huge pages is controlled by /proc/sys/vm/nr_overcommit_hugepages. +Hugepagesize is the default hugepage size (in Kb). +Hugetlb is the total amount of memory (in kB), consumed by huge + pages of all sizes. + If huge pages of different sizes are in use, this number + will exceed HugePages_Total * Hugepagesize. To get more + detailed information, please, refer to + /sys/kernel/mm/hugepages (described below). + /proc/filesystems should also show a filesystem of type "hugetlbfs" configured in the kernel. diff --git a/Documentation/vm/hwpoison.txt b/Documentation/vm/hwpoison.txt index 6ae89a9edf2a..e912d7eee769 100644 --- a/Documentation/vm/hwpoison.txt +++ b/Documentation/vm/hwpoison.txt @@ -104,7 +104,7 @@ madvise(MADV_HWPOISON, ....) hwpoison-inject module through debugfs -/sys/debug/hwpoison/ +/sys/kernel/debug/hwpoison/ corrupt-pfn |