On Sat, 20 Mar 2010 22:05:13 +0800, jing zhang <zj.barak@xxxxxxxxx> wrote: > > Evening, > > Thanks Andreas and Ted for your good explanations to deal error in > gentle way, and I got it that the chance may exist since the pa is not > deleted from its group_list yet. > > And it also seems that there is work deserved. > - zj > > --- > > --- linux-2.6.32/fs/ext4/mballoc.c 2009-12-03 11:51:22.000000000 +0800 > +++ fs/mballoc.c 2010-03-20 21:40:04.000000000 +0800 > @@ -3788,14 +3788,14 @@ repeat: > err = ext4_mb_load_buddy(sb, group, &e4b); > if (err) { > ext4_error(sb, __func__, "Error in loading buddy " > - "information for %u", group); > + "information for group %u inode %lu", group, inode->i_ino); > continue; > } > > bitmap_bh = ext4_read_block_bitmap(sb, group); > if (bitmap_bh == NULL) { > ext4_error(sb, __func__, "Error in reading block " > - "bitmap for %u", group); > + "bitmap for group %u inode %lu", group, inode->i_ino); > ext4_mb_release_desc(&e4b); > continue; > } > @@ -3811,6 +3811,14 @@ repeat: > list_del(&pa->u.pa_tmp_list); > call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback); > } > + if (! list_empty(&list)) { > + /* > + * we have to do something for the check in > + * the function, ext4_mb_discard_group_preallocations() > + */ > + list_for_each_entry(pa, &list, u.pa_tmp_list) > + pa->pa_deleted = 0; > + } > if (ac) > kmem_cache_free(ext4_ac_cachep, ac); > } Can you add a comment saying if we fail to load buddy or read block bitmap we skip freeing the prealloc space. So mark it undeleted. The prealloc space is still removed from the inode but it is linked to the group prealloc list via (pa_group_list) -aneesh -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html