Displaying 5 results from an estimated 5 matches for "__pskb_pull_tail".
2018 Jul 02
1
[PATCH vhost] vhost_net: Fix too many vring kick on busypoll
...t;> in vhost_net. Then vhost_net_tx_select_zcopy() may choose not to use
>>> zerocopy. So it was probably something in your setup or a bug somewhere.
>> Thanks for the hint!
Seems zerocopy packets are always nonlinear and
netif_receive_generic_xdp() calls skb_linearize() in which
__pskb_pull_tail() calls skb_zcopy_clear(). Looks like tx_zcopy_err is
always counted when zerocopy is used with XDP in my env.
--
Toshiaki Makita
2011 Jun 24
19
SKB paged fragment lifecycle on receive
...umber of nasty corner cases etc. It also seemed
that the proportion of SKBs which get cloned at least once appeared as
if it could be quite high which would presumably make the performance
impact unacceptable when using the flag. Another issue with using the
skb destructor is that functions such as __pskb_pull_tail will eat (and
free) pages from the start of the frag array such that by the time the
skb destructor is called they are no longer there.
AIUI Rusty Russell had previously looked into a per-page destructor in
the shinfo but found that it couldn''t be made to work (I don''t remember
w...
2013 Oct 08
1
OT: errors compiling kernel module as a rpm package
...969 kernel(__dev_get_by_index) = 0x6a6d551b
kernel(__init_waitqueue_head) = 0xffc7c184 kernel(__ip_select_ident) =
0x848695b3 kernel(__kmalloc) = 0x5a34a45c kernel(__list_add) =
0x0343a1a8 kernel(__nla_put) = 0x3e2e6f8c kernel(__nla_reserve) =
0x391515a6 kernel(__per_cpu_offset) = 0x32047ad5
kernel(__pskb_pull_tail) = 0xaa1b9b4e kernel(__put_net) = 0xcb27f3de
kernel(__secpath_destroy) = 0x430555cc kernel(__skb_checksum_complete)
= 0xcf0b750c kernel(__skb_warn_lro_forwarding) = 0x4d288688
kernel(__stack_chk_fail) = 0xf0fdf6cb kernel(__wake_up) = 0x642e54ac
kernel(_read_lock) = 0x1a75caa3 kernel(_spin_lock) = 0...
2018 Jul 02
2
[PATCH vhost] vhost_net: Fix too many vring kick on busypoll
On 2018/07/02 15:17, Jason Wang wrote:
> On 2018?07?02? 12:37, Toshiaki Makita wrote:
>> On 2018/07/02 11:54, Jason Wang wrote:
>>> On 2018?07?02? 10:45, Toshiaki Makita wrote:
>>>> Hi Jason,
>>>>
>>>> On 2018/06/29 18:30, Jason Wang wrote:
>>>>> On 2018?06?29? 16:09, Toshiaki Makita wrote:
>>>> ...
2018 Jul 02
2
[PATCH vhost] vhost_net: Fix too many vring kick on busypoll
On 2018/07/02 15:17, Jason Wang wrote:
> On 2018?07?02? 12:37, Toshiaki Makita wrote:
>> On 2018/07/02 11:54, Jason Wang wrote:
>>> On 2018?07?02? 10:45, Toshiaki Makita wrote:
>>>> Hi Jason,
>>>>
>>>> On 2018/06/29 18:30, Jason Wang wrote:
>>>>> On 2018?06?29? 16:09, Toshiaki Makita wrote:
>>>> ...