On 11/06/2013 05:06 PM, Konstantin Khlebnikov wrote:
> In this case it must stop after scanning whole tree in line:
> /* Overflow after ~0UL */
> if (!index)
> return NULL;
>
A fresh current example with latest git tree shows that lines 769 and 770 do
alternate :
tfoerste@n22 ~/devel/linux $ sudo gdb /usr/local/bin/linux-v3.12-48-gbe408cd
16619 -n -batch -ex bt
0x08296a8c in radix_tree_next_chunk (root=0x25, iter=0x462e7c64, flags=12) at
lib/radix-tree.c:770
770 if (node->slots[offset])
#0 0x08296a8c in radix_tree_next_chunk (root=0x25, iter=0x462e7c64, flags=12)
at lib/radix-tree.c:770
#1 0x080cc1fe in find_get_pages (mapping=0x462ad470, start=0, nr_pages=14,
pages=0xc) at mm/filemap.c:844
#2 0x080d5d6a in pagevec_lookup (pvec=0x462e7cc8, mapping=0x25, start=37,
nr_pages=37) at mm/swap.c:914
#3 0x080d615a in truncate_inode_pages_range (mapping=0x462ad470, lstart=0,
lend=-1) at mm/truncate.c:241
#4 0x080d64ff in truncate_inode_pages (mapping=0x25, lstart=51539607589) at
mm/truncate.c:358
tfoerste@n22 ~/devel/linux $ sudo gdb /usr/local/bin/linux-v3.12-48-gbe408cd
16619 -n -batch -ex bt
radix_tree_next_chunk (root=0x28, iter=0x462e7c64, flags=18) at
lib/radix-tree.c:769
769 while (++offset < RADIX_TREE_MAP_SIZE) {
#0 radix_tree_next_chunk (root=0x28, iter=0x462e7c64, flags=18) at
lib/radix-tree.c:769
#1 0x080cc1fe in find_get_pages (mapping=0x462ad470, start=0, nr_pages=14,
pages=0x12) at mm/filemap.c:844
#2 0x080d5d6a in pagevec_lookup (pvec=0x462e7cc8, mapping=0x28, start=40,
nr_pages=40) at mm/swap.c:914
#3 0x080d615a in truncate_inode_pages_range (mapping=0x462ad470, lstart=0,
lend=-1) at mm/truncate.c:241
#4 0x080d64ff in truncate_inode_pages (mapping=0x28, lstart=77309411368) at
mm/truncate.c:358
#5 0x0825e388 in hostfs_evict_inode (inode=0x462ad3b8) at
fs/hostfs/hostfs_kern.c:242
#6 0x0811a8df in evict (inode=0x462ad3b8) at fs/inode.c:549
--
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
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