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linux: Add MAP_DROPPABLE from Linux 6.11

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This request the page to be never written out to swap, it will be zeroed
under memory pressure (so kernel can just drop the page), it is inherited
by fork, it is not counted against @code{mlock} budget, and if there is
no enough memory to service a page faults there is no fatal error (so not
signal is sent).

Tested with build-many-glibcs.py.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Adhemerval Zanella
2024-10-08 15:45:26 -03:00
parent 86f06282cc
commit f6e849fd7c
3 changed files with 11 additions and 1 deletions
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2
sysdeps/unix/sysv/linux/tst-mman-consts.py
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@@ -33,7 +33,7 @@ def main():
help='C compiler (including options) to use')
args = parser.parse_args()
linux_version_headers = glibcsyscalls.linux_kernel_version(args.cc)
linux_version_glibc = (6, 10)
linux_version_glibc = (6, 11)
sys.exit(glibcextract.compare_macro_consts(
'#define _GNU_SOURCE 1\n'
'#include <sys/mman.h>\n',