[parisc-linux] documented Oops running big-endian reiserfs on parisc architecture

[Matthew Wilcox]

On Sun, Sep 02, 2001 at 10:55:38AM +0200, thunder7@xs4all.nl wrote:
> ReiserFS version 3.6.25
> bonnie[163]: Unaligned data reference 28

As it says, an unaligned data reference.

> r0-3     00000000 102ec550 10197d0c 26f24838

> IASQ: 00000000 00000000 IAOQ: 10197d10 10197d14

In kernel mode.

> 10197d10:       0c 7c 10 93     ldw  e(sr0,r3),r19

r3 is 26f24838, and offset `e' from that is unaligned.

> which makes the error somewhere around here in 
> fs/reiserfs/namei.c, function reiserfs_add_entry, after call to
> padd_item, before call to reiserfs_find_entry:
> 
>     /* copy name */
>     memcpy ((char *)(deh + 1), name, namelen);
>     /* padd by 0s to the 4 byte boundary */
>     padd_item ((char *)(deh + 1), ROUND_UP (namelen), namelen);
> 
>     /* entry is ready to be pasted into tree, set 'visibility' and 'stat data in entry' attributes */
>     mark_de_without_sd (deh);
>     visible ? mark_de_visible (deh) : mark_de_hidden (deh);
> 
>     /* find the proper place for the new entry */
>     memset (bit_string, 0, sizeof (bit_string));
>     de.de_gen_number_bit_string = (char *)bit_string;
>     retval = reiserfs_find_entry (dir, name, namelen, &path, &de);

I suspect mark_de_without_sd is an inlined function/macro and this will
be where the unaligned data reference is happening.

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