| From: Yang Shi <shy828301@gmail.com> |
| Subject: doc: proc: fix the description to THPeligible |
| Date: Thu, 16 Jun 2022 10:48:40 -0700 |
| |
| The THPeligible bit shows 1 if and only if the VMA is eligible for |
| allocating THP and the THP is also PMD mappable. Some misaligned file |
| VMAs may be eligible for allocating THP but the THP can't be mapped by |
| PMD. Make this more explicitly to avoid ambiguity. |
| |
| Link: https://lkml.kernel.org/r/20220616174840.1202070-8-shy828301@gmail.com |
| Signed-off-by: Yang Shi <shy828301@gmail.com> |
| Reviewed-by: Zach O'Keefe <zokeefe@google.com> |
| Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> |
| Cc: Matthew Wilcox <willy@infradead.org> |
| Cc: Miaohe Lin <linmiaohe@huawei.com> |
| Cc: Vlastimil Babka <vbabka@suse.cz> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| Documentation/filesystems/proc.rst | 4 +++- |
| 1 file changed, 3 insertions(+), 1 deletion(-) |
| |
| --- a/Documentation/filesystems/proc.rst~doc-proc-fix-the-description-to-thpeligible |
| +++ a/Documentation/filesystems/proc.rst |
| @@ -517,8 +517,10 @@ replaced by copy-on-write) part of the u |
| "SwapPss" shows proportional swap share of this mapping. Unlike "Swap", this |
| does not take into account swapped out page of underlying shmem objects. |
| "Locked" indicates whether the mapping is locked in memory or not. |
| + |
| "THPeligible" indicates whether the mapping is eligible for allocating THP |
| -pages - 1 if true, 0 otherwise. It just shows the current status. |
| +pages as well as the THP is PMD mappable or not - 1 if true, 0 otherwise. |
| +It just shows the current status. |
| |
| "VmFlags" field deserves a separate description. This member represents the |
| kernel flags associated with the particular virtual memory area in two letter |
| _ |
