mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-09-07 22:15:19 +00:00
Alloc: Disable transparent huge pages
The usage pattern implemented in allocator seems to be incompatible with transparent huge pages, as memory released using madvise(MADV_DONTNEED) with regular page size and alignment does not seem to trigger demotion of huge pages back to regular pages, even when significant number of pages is released. Even if demotion is triggered when system memory is low, it still breaks memory accounting.
This commit is contained in:
parent
54234c9eae
commit
928a1cb034
@ -14,3 +14,6 @@ CONFIG_DONTROUTE_UNICAST Use MSG_DONTROUTE flag for unicast packets (def for Fre
|
||||
CONFIG_USE_HDRINCL Use IP_HDRINCL instead of control messages for source address on raw IP sockets.
|
||||
|
||||
CONFIG_RESTRICTED_PRIVILEGES Implements restricted privileges using drop_uid()
|
||||
|
||||
CONFIG_MADV_DONTNEED_TO_FREE To free pages, use MADV_DONTNEED instead of MADV_FREE (linux)
|
||||
CONFIG_DISABLE_THP Disable transparent huge pages (linux)
|
||||
|
@ -24,6 +24,7 @@
|
||||
#define CONFIG_INCLUDE_SYSPRIV_H "sysdep/linux/syspriv.h"
|
||||
|
||||
#define CONFIG_MADV_DONTNEED_TO_FREE
|
||||
#define CONFIG_DISABLE_THP
|
||||
|
||||
#ifndef AF_MPLS
|
||||
#define AF_MPLS 28
|
||||
|
@ -19,6 +19,10 @@
|
||||
#include <sys/mman.h>
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_DISABLE_THP
|
||||
#include <sys/prctl.h>
|
||||
#endif
|
||||
|
||||
long page_size = 0;
|
||||
|
||||
#ifdef HAVE_MMAP
|
||||
@ -218,6 +222,12 @@ global_free_pages_cleanup_event(void *data UNUSED)
|
||||
void
|
||||
resource_sys_init(void)
|
||||
{
|
||||
#ifdef CONFIG_DISABLE_THP
|
||||
/* Disable transparent huge pages, they do not work properly with madvice(MADV_DONTNEED) */
|
||||
if (prctl(PR_SET_THP_DISABLE, (unsigned long) 1, (unsigned long) 0, (unsigned long) 0, (unsigned long) 0) < 0)
|
||||
die("prctl(PR_SET_THP_DISABLE) failed: %m");
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_MMAP
|
||||
ASSERT_DIE(global_free_pages.cnt == 0);
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user