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mach: Use PAGE_SIZE

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The PAGE_SIZE from the Mach headers statically defines the machine's
page size. There's no need to query it dynamically; furthermore, the
implementation of the vm_statistics () RPC unconditionally fills in

pagesize = PAGE_SIZE;

Not doing the extra RPC shaves off 2 RPCs from the start-up of every
process!

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230218203717.373211-7-bugaevc@gmail.com>
This commit is contained in:
Sergey Bugaev 2023-02-18 23:37:14 +03:00 committed by Samuel Thibault
parent 90ab316b02
commit be318c0f38
1 changed files with 5 additions and 1 deletions
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6
mach/mach_init.c
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@ -17,6 +17,7 @@
#include <mach.h> #include <mach.h>
#include <mach/mig_support.h> #include <mach/mig_support.h>
#include <mach/vm_param.h>
#include <unistd.h> #include <unistd.h>
mach_port_t __mach_task_self_; mach_port_t __mach_task_self_;
@ -38,7 +39,10 @@ __mach_init (void)
__mach_host_self_ = (__mach_host_self) (); __mach_host_self_ = (__mach_host_self) ();
__mig_init (0); __mig_init (0);
#ifdef HAVE_HOST_PAGE_SIZE #ifdef PAGE_SIZE
__vm_page_size = PAGE_SIZE;
(void) err;
#elif defined (HAVE_HOST_PAGE_SIZE)
if (err = __host_page_size (__mach_host_self (), &__vm_page_size)) if (err = __host_page_size (__mach_host_self (), &__vm_page_size))
_exit (err); _exit (err);
#else #else