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SubjectRe: initramfs fails for medium sized cpio archives
Trammell Hudson <hudson@osresearch.net> wrote:
>
> unmapped_ratio = 100 - (ps->nr_mapped * 100) / total_pages;
>
> I've added a sanity check in get_dirty_limits() that initialized
> total_pages if it is still zero and things seem to work, but
> should some of the memory management modules be initialized first?

This is fixed in 2.5.65, with the below patch.

> The kernel is booting on an Athlon and compiled with gcc 3.2.2.
> The cpio archive is uClibc based and is about 600 k in size.
> I created it with the following command:
>
> find . \
> | cpio -H crc -ov \
> | gzip
> > ../linux-2.5.64/usr/initramfs_data.cpio.gz

Neat. Nice to see it working.


--- 25/include/linux/writeback.h~early-writeback-init 2003-03-16 22:54:07.000000000 -0800
+++ 25-akpm/include/linux/writeback.h 2003-03-16 22:54:07.000000000 -0800
@@ -79,6 +79,7 @@ extern int dirty_writeback_centisecs;
extern int dirty_expire_centisecs;


+void page_writeback_init(void);
void balance_dirty_pages(struct address_space *mapping);
void balance_dirty_pages_ratelimited(struct address_space *mapping);
int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0);
diff -puN init/main.c~early-writeback-init init/main.c
--- 25/init/main.c~early-writeback-init 2003-03-16 22:54:07.000000000 -0800
+++ 25-akpm/init/main.c 2003-03-16 22:54:07.000000000 -0800
@@ -35,6 +35,7 @@
#include <linux/profile.h>
#include <linux/rcupdate.h>
#include <linux/moduleparam.h>
+#include <linux/writeback.h>

#include <asm/io.h>
#include <asm/bugs.h>
@@ -443,6 +444,8 @@ asmlinkage void __init start_kernel(void
vfs_caches_init(num_physpages);
radix_tree_init();
signals_init();
+ /* rootfs populating might need page-writeback */
+ page_writeback_init();
populate_rootfs();
#ifdef CONFIG_PROC_FS
proc_root_init();
diff -puN mm/page-writeback.c~early-writeback-init mm/page-writeback.c
--- 25/mm/page-writeback.c~early-writeback-init 2003-03-16 22:54:07.000000000 -0800
+++ 25-akpm/mm/page-writeback.c 2003-03-16 22:54:07.000000000 -0800
@@ -369,7 +369,7 @@ static struct notifier_block ratelimit_n
* dirty memory thresholds: allowing too much dirty highmem pins an excessive
* number of buffer_heads.
*/
-static int __init page_writeback_init(void)
+void __init page_writeback_init(void)
{
long buffer_pages = nr_free_buffer_pages();
long correction;
@@ -392,9 +392,7 @@ static int __init page_writeback_init(vo
add_timer(&wb_timer);
set_ratelimit();
register_cpu_notifier(&ratelimit_nb);
- return 0;
}
-module_init(page_writeback_init);

int do_writepages(struct address_space *mapping, struct writeback_control *wbc)
{
_

-
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