On 11/06/2013 10:31 PM, Richard Weinberger wrote:
> Am 06.11.2013 22:18, schrieb Toralf Förster:
>> 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 :
>
> Can you please ask gdb for the value of offset?
>
> Thanks,
> //richard
>
In the mean while I think that it is not the radix-tree itself where the hang
is related to. With this patch :
diff --git a/mm/truncate.c b/mm/truncate.c
index 353b683..22a5926 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -355,6 +355,8 @@ EXPORT_SYMBOL(truncate_inode_pages_range);
*/
void truncate_inode_pages(struct address_space *mapping, loff_t lstart)
{
+ if (lstart > 0)
+ printk ("lstart=%lld\n", lstart);
truncate_inode_pages_range(mapping, lstart, (loff_t)-1);
}
EXPORT_SYMBOL(truncate_inode_pages);
against v3.12-10087-g1213959 I get in the syslog entires like :
Nov 17 14:07:12 trinity tfoerste: M=/mnt/nfsv4
Nov 17 14:07:27 trinity kernel: lstart=2147418111
Nov 17 14:07:30 trinity kernel: lstart=14531581
Nov 17 14:07:30 trinity kernel: lstart=8388607
Nov 17 14:07:30 trinity kernel: lstart=187
Nov 17 14:07:32 trinity kernel: lstart=2048
Nov 17 14:08:00 trinity kernel: lstart=11264
Nov 17 14:08:00 trinity kernel: lstart=44297
Nov 17 14:08:05 trinity kernel: lstart=31
Nov 17 14:08:34 trinity kernel: lstart=1542
Nov 17 14:08:35 trinity kernel: lstart=30
Nov 17 14:08:35 trinity kernel: lstart=2088809
Nov 17 14:08:37 trinity kernel: lstart=208
Nov 17 14:08:37 trinity kernel: lstart=7276806
Nov 17 14:08:37 trinity kernel: lstart=191
...
Nov 17 14:11:22 trinity tfoerste: M=/mnt/nfsv4
Nov 17 14:11:36 trinity kernel: lstart=255
Nov 17 14:11:36 trinity kernel: lstart=500676444
Nov 17 14:11:37 trinity kernel: lstart=1024
Nov 17 14:11:37 trinity kernel: lstart=12786775
Nov 17 14:11:37 trinity kernel: lstart=16728385
Nov 17 14:11:37 trinity kernel: lstart=44
Nov 17 14:11:37 trinity kernel: lstart=516
Nov 17 14:11:38 trinity kernel: lstart=17407
Nov 17 14:11:38 trinity kernel: lstart=31
Nov 17 14:11:38 trinity kernel: lstart=65534
Nov 17 14:11:39 trinity kernel: lstart=4302304271
Nov 17 14:11:40 trinity kernel: lstart=65536
Nov 17 14:11:40 trinity kernel: lstart=678625087
Nov 17 14:11:40 trinity kernel: lstart=190464262
Nov 17 14:11:41 trinity kernel: lstart=268435343
Nov 17 14:11:42 trinity kernel: lstart=109
Nov 17 14:11:42 trinity kernel: lstart=2088960
Nov 17 14:11:42 trinity kernel: lstart=989582838
Nov 17 14:11:42 trinity kernel: lstart=3838
Nov 17 14:11:42 trinity kernel: lstart=327
Nov 17 14:11:43 trinity kernel: lstart=119
Nov 17 14:12:14 trinity kernel: lstart=9949
Nov 17 14:12:14 trinity kernel: lstart=4096
Nov 17 14:12:15 trinity kernel: lstart=3
Nov 17 14:12:18 trinity sshd[9636]: pam_unix(sshd:session): session closed for
user tfoerste
...
Does this helps ?
>>
>> 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
------------------------------------------------------------------------------
DreamFactory - Open Source REST & JSON Services for HTML5 & Native Apps
OAuth, Users, Roles, SQL, NoSQL, BLOB Storage and External API Access
Free app hosting. Or install the open source package on any LAMP server.
Sign up and see examples for AngularJS, jQuery, Sencha Touch and Native!
http://pubads.g.doubleclick.net/gampad/clk?id=63469471&iu=/4140/ostg.clktrk
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
