LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

proc.5: Document /proc/sys/vm/unprivileged_userfaultfd 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2020-01-21 21:59:14 +01:00
parent c4f13bc72a
commit 465b6c35e9
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
man5/proc.5
View File

@ -5772,6 +5772,19 @@ Any subsequent attempts to execute a command will result in
Changing the value in this file takes effect whenever
an application requests memory.
.TP
.IR /proc/sys/vm/unprivileged_userfaultfd " (since Linux 5.2)"
.\" cefdca0a86be517bc390fc4541e3674b8e7803b0
This (writable) file exposes a flag that controls whether
unprivileged processes are allowed to employ
.BR userfaultfd (2).
If this file has the value 1, then unprivileged processes may use
.BR userfaultfd (2).
If this file has the value 0, then only processes that have the
.B CAP_SYS_PTRACE
capability may employ
.BR userfaultfd (2).
The default value in this file is 1.
.TP
.IR /proc/sysrq-trigger " (since Linux 2.4.21)"
Writing a character to this file triggers the same SysRq function as
typing ALT-SysRq-<character> (see the description of