Re: RAID0 problems with 2.4.21-BK current

[Neil Brown]

On Sunday December 29, [e-mail] wrote:
> Hi Neil,
> 
> this:
> 
> http://linux.bkbits.net:8080/linux-2.4/patch@1.884.1.69?nav=index.html|ChangeSet@-2w|cset@1.884.1.69
> 
> patch breaks at least RAID 0 recognition at boottime (infinite loop) and also 
> breaks mkraid /dev/md0. Never stops, State D.
> 
> Ripping the patch out helps.

Is your raid0 ontop of a raid1 ???
If so, this patch is needed.

NeilBrown

--------------------------------------------------------
Set BH_Locked when accessing MD superblocks

Some silly drivers (like raid1 !!) want  BH_Locked to be set on all IO,
so we humour them by setting the bit when doing superblock IO.

 ----------- Diffstat output ------------
 ./drivers/md/md.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff ./drivers/md/md.c~current~ ./drivers/md/md.c
--- ./drivers/md/md.c~current~	2002-12-17 15:20:57.000000000 +1100
+++ ./drivers/md/md.c	2003-01-02 11:05:20.000000000 +1100
@@ -489,7 +489,7 @@ static int sync_page_io(kdev_t dev, unsi
 	init_buffer(&bh, bh_complete, &event);
 	bh.b_rdev = dev;
 	bh.b_rsector = sector;
-	bh.b_state	= (1 << BH_Req) | (1 << BH_Mapped);
+	bh.b_state	= (1 << BH_Req) | (1 << BH_Mapped) | (1 << BH_Locked);
 	bh.b_size = size;
 	bh.b_page = page;
 	bh.b_reqnext = NULL;