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Diffstat (limited to 'man5/proc_kpageflags.5')
| -rw-r--r-- | man5/proc_kpageflags.5 | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/man5/proc_kpageflags.5 b/man5/proc_kpageflags.5 new file mode 100644 index 0000000..5c23d02 --- /dev/null +++ b/man5/proc_kpageflags.5 @@ -0,0 +1,75 @@ +'\" t +.\" Copyright (C) 1994, 1995, Daniel Quinlan <quinlan@yggdrasil.com> +.\" Copyright (C) 2002-2008, 2017, Michael Kerrisk <mtk.manpages@gmail.com> +.\" Copyright (C) 2023, Alejandro Colomar <alx@kernel.org> +.\" +.\" SPDX-License-Identifier: GPL-3.0-or-later +.\" +.TH proc_kpageflags 5 2023-08-15 "Linux man-pages 6.7" +.SH NAME +/proc/kpageflags \- physical pages frame masks +.SH DESCRIPTION +.TP +.IR /proc/kpageflags " (since Linux 2.6.25)" +This file contains 64-bit masks corresponding to each physical page frame; +it is indexed by page frame number (see the discussion of +.IR /proc/ pid /pagemap ). +The bits are as follows: +.RS +.IP +.TS +r l l l. +0 - KPF_LOCKED +1 - KPF_ERROR +2 - KPF_REFERENCED +3 - KPF_UPTODATE +4 - KPF_DIRTY +5 - KPF_LRU +6 - KPF_ACTIVE +7 - KPF_SLAB +8 - KPF_WRITEBACK +9 - KPF_RECLAIM +10 - KPF_BUDDY +11 - KPF_MMAP (since Linux 2.6.31) +12 - KPF_ANON (since Linux 2.6.31) +13 - KPF_SWAPCACHE (since Linux 2.6.31) +14 - KPF_SWAPBACKED (since Linux 2.6.31) +15 - KPF_COMPOUND_HEAD (since Linux 2.6.31) +16 - KPF_COMPOUND_TAIL (since Linux 2.6.31) +17 - KPF_HUGE (since Linux 2.6.31) +18 - KPF_UNEVICTABLE (since Linux 2.6.31) +19 - KPF_HWPOISON (since Linux 2.6.31) +20 - KPF_NOPAGE (since Linux 2.6.31) +21 - KPF_KSM (since Linux 2.6.32) +22 - KPF_THP (since Linux 3.4) +23 - KPF_BALLOON (since Linux 3.18) +.\" KPF_BALLOON: commit 09316c09dde33aae14f34489d9e3d243ec0d5938 +24 - KPF_ZERO_PAGE (since Linux 4.0) +.\" KPF_ZERO_PAGE: commit 56873f43abdcd574b25105867a990f067747b2f4 +25 - KPF_IDLE (since Linux 4.3) +.\" KPF_IDLE: commit f074a8f49eb87cde95ac9d040ad5e7ea4f029738 +26 - KPF_PGTABLE (since Linux 4.18) +.\" KPF_PGTABLE: commit 1d40a5ea01d53251c23c7be541d3f4a656cfc537 +.TE +.RE +.IP +For further details on the meanings of these bits, +see the kernel source file +.IR Documentation/admin\-guide/mm/pagemap.rst . +Before Linux 2.6.29, +.\" commit ad3bdefe877afb47480418fdb05ecd42842de65e +.\" commit e07a4b9217d1e97d2f3a62b6b070efdc61212110 +.BR KPF_WRITEBACK , +.BR KPF_RECLAIM , +.BR KPF_BUDDY , +and +.B KPF_LOCKED +did not report correctly. +.IP +The +.I /proc/kpageflags +file is present only if the +.B CONFIG_PROC_PAGE_MONITOR +kernel configuration option is enabled. +.SH SEE ALSO +.BR proc (5) |