populate_rootfs() is called rather early - before we've called init_idle().
But populate_rootfs() does file I/O, which involves calls to cond_resched(),
and downing of semaphores, etc. If it scheules, the scheduler emits
scheduling-while-atomic warnings and sometimes oopses.
So run populate_rootfs() later, after the scheduler is all set up.
---
25-akpm/init/main.c | 21 ++++++++++-----------
1 files changed, 10 insertions(+), 11 deletions(-)
diff -puN init/main.c~populate-rootfs-later init/main.c
--- 25/init/main.c~populate-rootfs-later 2004-04-15 18:03:02.838445296 -0700
+++ 25-akpm/init/main.c 2004-04-15 18:05:21.643343744 -0700
@@ -88,6 +88,7 @@ extern void radix_tree_init(void);
extern void free_initmem(void);
extern void populate_rootfs(void);
extern void driver_init(void);
+extern void prepare_namespace(void);
#ifdef CONFIG_TC
extern void tc_init(void);
@@ -514,7 +515,6 @@ asmlinkage void __init start_kernel(void
signals_init();
/* rootfs populating might need page-writeback */
page_writeback_init();
- populate_rootfs();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
@@ -619,8 +619,6 @@ static void run_init_process(char *init_
execve(init_filename, argv_init, envp_init);
}
-extern void prepare_namespace(void);
-
static int init(void * unused)
{
lock_kernel();
@@ -643,14 +641,15 @@ static int init(void * unused)
sched_init_smp();
do_basic_setup();
- /*
- * check if there is an early userspace init, if yes
- * let it do all the work
- */
- if (sys_access("/init", 0) == 0)
- execute_command = "/init";
- else
- prepare_namespace();
+ populate_rootfs();
+ /*
+ * check if there is an early userspace init. If yes, let it do all
+ * the work
+ */
+ if (sys_access("/init", 0) == 0)
+ execute_command = "/init";
+ else
+ prepare_namespace();
/*
* Ok, we have completed the initial bootup, and
_