Re: [PATCH][2.6-mm] defer free_initmem() if we have no /init

["Mika Penttilä" <mika.penttila@kolumbus.fi>]

Zwane Mwaikambo wrote:

>In the absence of /init and other nice boot goodies, we fall through to
>prepare_namespace() so we shall require initmem to complete boot.
>
>
>Index: linux-2.6.5-rc2-mm1/init/main.c
>===================================================================
>RCS file: /home/cvsroot/linux-2.6.5-rc2-mm1/init/main.c,v
>retrieving revision 1.1.1.1
>diff -u -p -B -r1.1.1.1 main.c
>--- linux-2.6.5-rc2-mm1/init/main.c	21 Mar 2004 17:02:18 -0000	1.1.1.1
>+++ linux-2.6.5-rc2-mm1/init/main.c	21 Mar 2004 20:54:19 -0000
>@@ -586,8 +586,8 @@ static int free_initmem_on_exec_helper(v
> 	char c;
>
> 	sys_close(fd[1]);
>-	sys_read(fd[0], &c, 1);
>-	free_initmem();
>+	if (sys_read(fd[0], &c, 1) > 0)
>+		free_initmem();
> 	return 0;
> }
>  
>

But the above change makes the early init case to not free initmem, 
which was the whole purpose of the close_on_exec + read + broken pipe 
hassle, I think.



--Mika