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| author | Yang Shi <shy828301@gmail.com> | 2022-06-16 20:48:40 +0300 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-07-18 03:14:33 +0300 |
| commit | cb55b83862647da3fbe4135de1723fa78e2357a3 (patch) | |
| tree | b8c1c91b05068fabbf2bd5fee1ea30c9e62b7caa /Documentation/filesystems | |
| parent | 1064026bab9f011bdea1251d44d66bbbcee04f6e (diff) | |
| download | linux-cb55b83862647da3fbe4135de1723fa78e2357a3.tar.xz | |
doc: proc: fix the description to THPeligible
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>
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/proc.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index 0b5120ff506c..e7aafc82be99 100644 --- a/Documentation/filesystems/proc.rst +++ b/Documentation/filesystems/proc.rst @@ -517,8 +517,10 @@ replaced by copy-on-write) part of the underlying shmem object out on swap. "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 |