Stored pages release routine (821344c7) · Commits · 戴 / Bird

sysdep/unix/alloc.c

+29 −0

Original line number	Diff line number	Diff line
		@@ -135,3 +135,32 @@ free_sys_page(void *ptr)
		#endif
		free(ptr);
		}

		void
		check_stored_pages(void)
		{
		#ifdef ENOMEM
		if (atomic_load_explicit(&global_page_list_not_empty, memory_order_relaxed) == 0)
		return;

		for (uint limit = 0; limit < 256; limit++)
		{
		GLOBAL_PAGE_SPIN_LOCK;
		void *ptr = HEAD(global_page_list);
		if (!NODE_VALID(ptr))
		{
		atomic_store_explicit(&global_page_list_not_empty, 0, memory_order_relaxed);
		GLOBAL_PAGE_SPIN_UNLOCK;
		return;
		}

		rem_node(ptr);
		if (munmap(ptr, page_size) < 0)
		if (errno == ENOMEM)
		add_tail(&global_page_list, ptr);
		else
		bug("munmap(%p) failed: %m", ptr);
		GLOBAL_PAGE_SPIN_UNLOCK;
		}
		#endif
		}

+4 −0

Original line number	Diff line number	Diff line
		@@ -2193,6 +2193,7 @@ static int short_loops = 0;
		#define WORK_EVENTS_MAX 10

		void pipe_drain(int fd);
		void check_stored_pages(void);

		void
		io_loop(void)
		@@ -2215,6 +2216,9 @@ io_loop(void)
		timers_fire(&main_birdloop.time, 1);
		io_close_event();

		/* Try to release some memory if possible */
		check_stored_pages();

		// FIXME
		poll_tout = (events ? 0 : 3000); /* Time in milliseconds */
		if (t = timers_first(&main_birdloop.time))