Adhemerval Zanella 5f6d8d97c6 malloc: Add madvise support for Transparent Huge Pages ... Linux Transparent Huge Pages (THP) current supports three different states: 'never', 'madvise', and 'always'. The 'never' is self-explanatory and 'always' will enable THP for all anonymous pages. However, 'madvise' is still the default for some system and for such case THP will be only used if the memory range is explicity advertise by the program through a madvise(MADV_HUGEPAGE) call. To enable it a new tunable is provided, 'glibc.malloc.hugetlb', where setting to a value diffent than 0 enables the madvise call. This patch issues the madvise(MADV_HUGEPAGE) call after a successful mmap() call at sysmalloc() with sizes larger than the default huge page size. The madvise() call is disable is system does not support THP or if it has the mode set to "never" and on Linux only support one page size for THP, even if the architecture supports multiple sizes. To test is a new rule is added tests-malloc-hugetlb1, which run the addes tests with the required GLIBC_TUNABLE setting. Checked on x86_64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>		2021-12-15 17:35:14 -03:00
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alpha	linux: Implement pipe in terms of __NR_pipe2	2021-11-30 13:13:03 -03:00
arm
bsd	Remove "Contributed by" lines	2021-09-03 22:06:44 +05:30
i386
inet
mips	linux: Implement pipe in terms of __NR_pipe2	2021-11-30 13:13:03 -03:00
powerpc
sh
sysv/linux	malloc: Add madvise support for Transparent Huge Pages	2021-12-15 17:35:14 -03:00
x86_64
confstr.h
get_child_max.c
getlogin_r.c
getlogin.c
getpagesize.c
grantpt.c	Remove "Contributed by" lines	2021-09-03 22:06:44 +05:30
ifreq.c	Remove "Contributed by" lines	2021-09-03 22:06:44 +05:30
Implies
make-syscalls.sh
Makefile	Remove the unused +mkdep/+make-deps/s-proto.S/s-proto-cancel.S	2021-11-10 04:54:18 -08:00
setxid.h
sockatmark.c
syscall-template.S
syscall.S
syscalls.list	misc: Add time64 alias for ioctl	2021-07-21 11:58:09 +02:00
sysdep.h	linux: Add generic syscall implementation	2021-12-06 08:03:11 -03:00