25 Jan
2017
25 Jan
'17
7:15 a.m.
On Mittwoch, 25. Januar 2017 03:18:10 CET jens wrote:
On 24.01.2017 14:39, Sven Eckelmann wrote:
[...]
There is no artificial limit added by batman-adv.
But transmitting a lot of
broadcasts over 255 virtual links sharing the same physical link
might get interesting (independent of batman-adv).
this made me curious , and i modified your script a bit - turns out
after the 127. IF you add to batman-adv you get an Error -
all 510 gretap links was succesfully build ...
# ifconfig |grep gre| wc -l
515
# batctl if|sort|wc -l
127
the error is mainly
*Error - can't write to file
'/sys/class/net/gre128/batman_adv/mesh_iface': Cannot allocate memory
[113990.684947] [<ffffffff8107c16e>] ?
__warn+0xbe/0xe0 [113990.684955]
[<ffffffffc017a804>] ? batadv_orig_hash_add_if+0x94/0x140 [batman_adv]
[113990.684961] [<ffffffff811a7b10>] ? kmalloc_slab+0x90/0xa0
[113990.684966] [<ffffffff811e08c5>] ? __kmalloc+0x25/0x580
[113990.684971] [<ffffffff815ef9d7>] ? _raw_spin_lock_irqsave+0x17/0x39
[113990.684977] [<ffffffff81432c11>] ? _crng_backtrack_protect+0x31/0x70
[113990.684981] [<ffffffff811e0ebc>] ? kmem_cache_alloc_trace+0x9c/0x540
[113990.684986] [<ffffffff814340b7>] ? get_random_bytes+0xe7/0x1c0
[113990.684991] [<ffffffffc017a804>] ?
[...]
I would guess that your system mostly fails becauseit cannot handle the
allocation of the "large" arrays which store:
* @bcast_own: set of bitfields (one per hard-interface) where each one counts
* the number of our OGMs this orig_node rebroadcasted "back" to us (relative
* to last_real_seqno). Every bitfield is BATADV_TQ_LOCAL_WINDOW_SIZE bits long.
* @bcast_own_sum: sum of bcast_own
Kind regards,
Sven
26 Dec
26 Dec
2:19 p.m.
New subject: [B.A.T.M.A.N.] limit of if per batman
On Mittwoch, 25. Januar 2017 08:15:52 CET Sven Eckelmann wrote:
[...]
[...]
this made me
curious , and i modified your script a bit - turns out
after the 127. IF you add to batman-adv you get an Error -
all 510 gretap links was succesfully build ...
# ifconfig |grep gre| wc -l
515
# batctl if|sort|wc -l
127
the error is mainly
*Error - can't write to file
'/sys/class/net/gre128/batman_adv/mesh_iface': Cannot allocate memory
[...] I would guess that your system mostly fails becauseit
cannot handle the
allocation of the "large" arrays which store:
[...]
Looks like their could also be a different problem when your test system uses
signed characters by default. Please try the patch [1] which changes the type
from char/s16 to unsigned int.
Kind regards,
Sven
[1] https://patchwork.open-mesh.org/patch/17247/
23 Jan
23 Jan
12:33 p.m.
New subject: [B.A.T.M.A.N.] limit of if per batman
On Dienstag, 26. Dezember 2017 15:19:41 CET Sven Eckelmann wrote:
On Mittwoch, 25. Januar 2017 08:15:52 CET Sven
Eckelmann wrote:
[...]
[...]
[...]
Were you able to run some tests?
Kind regards,
Sven
this made
me curious , and i modified your script a bit - turns out
after the 127. IF you add to batman-adv you get an Error -
all 510 gretap links was succesfully build ...
# ifconfig |grep gre| wc -l
515
# batctl if|sort|wc -l
127
the error is mainly
*Error - can't write to file
'/sys/class/net/gre128/batman_adv/mesh_iface': Cannot allocate memory
[...] I would guess that your system mostly fails
becauseit cannot handle the
allocation of the "large" arrays which store:
[...]
Looks like their could also be a different problem when your test system uses
signed characters by default. Please try the patch [1] which changes the type
from char/s16 to unsigned int.
3 Feb
3 Feb
7:41 a.m.
New subject: [B.A.T.M.A.N.] limit of if per batman
On Dienstag, 23. Januar 2018 13:33:01 CET Sven Eckelmann wrote:
On Dienstag, 26. Dezember 2017 15:19:41 CET Sven
Eckelmann wrote:
Would be good to have this tested because we already missed the Linux 4.15
release.
Kind regards,
Sven
On Mittwoch, 25. Januar 2017 08:15:52 CET Sven
Eckelmann wrote:
[...]
[...]
[...]
Were you able to run some tests? this made
me curious , and i modified your script a bit - turns out
after the 127. IF you add to batman-adv you get an Error -
all 510 gretap links was succesfully build ...
# ifconfig |grep gre| wc -l
515
# batctl if|sort|wc -l
127
the error is mainly
*Error - can't write to file
'/sys/class/net/gre128/batman_adv/mesh_iface': Cannot allocate memory
[...] I would guess that your system mostly fails
becauseit cannot handle the
allocation of the "large" arrays which store:
[...]
Looks like their could also be a different problem when your test system uses
signed characters by default. Please try the patch [1] which changes the type
from char/s16 to unsigned int.
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Sven Eckelmann