* Netlink send from the interrupt context
@ 2005-11-21 11:16 Robert Iakobashvili
0 siblings, 0 replies; 3+ messages in thread
From: Robert Iakobashvili @ 2005-11-21 11:16 UTC (permalink / raw)
To: netdev
Are there netlink socket netlink_unicast () and netlink_broadcast ()
interrupt safe?
If not, where is the problem and the direction to make them safe?
If it is not easy, what could be a workaroud?
Thank you in advance.
----------------------------------------------------------------
Robert Iakobashvili - NAVIGARE NECESSE EST
coroberti at gmail dot com
---------------------------------------------------------------
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Netlink send from the interrupt context
[not found] ` <7e63f56c0511230032x5097569dr3ddac4b05bb6019c@mail.gmail.com>
@ 2005-11-23 8:33 ` Robert Iakobashvili
2005-11-23 9:04 ` Yu Zhiguo
0 siblings, 1 reply; 3+ messages in thread
From: Robert Iakobashvili @ 2005-11-23 8:33 UTC (permalink / raw)
To: Yu Zhiguo; +Cc: netdev, netfilter-devel
On 11/23/05, Robert Iakobashvili <coroberti@gmail.com> wrote:
> On 11/23/05, Yu Zhiguo <yuzg@nanjing-fnst.com> wrote:
> > Please refer to the function netlink_broadcast(),
> > int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid, u32 group, int allocation)
> > I think if allocation=GFP_ATOMIC, it can be used in interrupt context.
> > What's your opinion?
Allocation is OK and it uses only spinlocks in all functions called,
no semaphores.
My concern actually rises from here:
http://www.ussg.iu.edu/hypermail/linux/kernel/0407.3/0455.html
Sincerely,
----------------------------------------------------------------
Robert Iakobashvili - NAVIGARE NECESSE EST
coroberti at gmail dot com
---------------------------------------------------------------
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Netlink send from the interrupt context
2005-11-23 8:33 ` Netlink send from the interrupt context Robert Iakobashvili
@ 2005-11-23 9:04 ` Yu Zhiguo
0 siblings, 0 replies; 3+ messages in thread
From: Yu Zhiguo @ 2005-11-23 9:04 UTC (permalink / raw)
To: Robert Iakobashvili; +Cc: netdev, netfilter-devel
yes, it use spinlocks rather than semaphore, and it can use GFP_ATOMIC to clone the message,
so I think it will not go sleep.
regards,
----- Original Message -----
> On 11/23/05, Robert Iakobashvili <coroberti@gmail.com> wrote:
>> On 11/23/05, Yu Zhiguo <yuzg@nanjing-fnst.com> wrote:
>> > Please refer to the function netlink_broadcast(),
>> > int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid, u32 group, int allocation)
>> > I think if allocation=GFP_ATOMIC, it can be used in interrupt context.
>> > What's your opinion?
>
> Allocation is OK and it uses only spinlocks in all functions called,
> no semaphores.
>
> My concern actually rises from here:
> http://www.ussg.iu.edu/hypermail/linux/kernel/0407.3/0455.html
>
> Sincerely,
> ----------------------------------------------------------------
> Robert Iakobashvili - NAVIGARE NECESSE EST
> coroberti at gmail dot com
> ---------------------------------------------------------------
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2005-11-23 8:33 ` Netlink send from the interrupt context Robert Iakobashvili
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2005-11-21 11:16 Robert Iakobashvili
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