* meant hlist_* - Re: hash_list and rcu locking question
@ 2008-08-07 1:49 Tobias Koeck
2008-08-07 3:53 ` Evgeniy Polyakov
2008-08-08 22:21 ` Paul E. McKenney
0 siblings, 2 replies; 3+ messages in thread
From: Tobias Koeck @ 2008-08-07 1:49 UTC (permalink / raw)
To: Evgeniy Polyakov; +Cc: NetDev
I mean the rcu function for the hlist_{head,list} ....
Greetings
t.
On Wed, Aug 6, 2008 at 10:54 PM, Evgeniy Polyakov <johnpol@2ka.mipt.ru> wrote:
> Hi Tobias.
>
> On Wed, Aug 06, 2008 at 05:56:43PM +0200, Tobias Koeck (tobias.koeck@gmail.com) wrote:
>> Are the hash_list rcu functions avoiding all locking problems (even
>> the one with only one CPU)?
>
> What is hash list? hlist? Or list in a hash bucket?
> Does include/linux/rculist.h contain needed bits?
>
>> Are there some abstract examples for the use of the hash_{head,list} structures?
>
> Sorry, my kernel source tree does not know what is 'hash_head'.
> What data structure exactly do you mean?
>
> --
> Evgeniy Polyakov
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: meant hlist_* - Re: hash_list and rcu locking question
2008-08-07 1:49 meant hlist_* - Re: hash_list and rcu locking question Tobias Koeck
@ 2008-08-07 3:53 ` Evgeniy Polyakov
2008-08-08 22:21 ` Paul E. McKenney
1 sibling, 0 replies; 3+ messages in thread
From: Evgeniy Polyakov @ 2008-08-07 3:53 UTC (permalink / raw)
To: Tobias Koeck; +Cc: NetDev
On Thu, Aug 07, 2008 at 03:49:43AM +0200, Tobias Koeck (tobias.koeck@gmail.com) wrote:
> I mean the rcu function for the hlist_{head,list} ....
include/linux/rculist.h : hlist_for_each_entry_rcu and friends.
Does it contain needded calls?
--
Evgeniy Polyakov
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: meant hlist_* - Re: hash_list and rcu locking question
2008-08-07 1:49 meant hlist_* - Re: hash_list and rcu locking question Tobias Koeck
2008-08-07 3:53 ` Evgeniy Polyakov
@ 2008-08-08 22:21 ` Paul E. McKenney
1 sibling, 0 replies; 3+ messages in thread
From: Paul E. McKenney @ 2008-08-08 22:21 UTC (permalink / raw)
To: Tobias Koeck; +Cc: Evgeniy Polyakov, NetDev
On Thu, Aug 07, 2008 at 03:49:43AM +0200, Tobias Koeck wrote:
> I mean the rcu function for the hlist_{head,list} ....
There are some examples in http://lwn.net/Articles/262464/
This document notes that updates must be protected by some sort of
synchronization mechanism, for example, a lock. RCU protects the
readers.
Additional information is available at http://lwn.net/Articles/263130/
and http://lwn.net/Articles/264090/
Thanx, Paul
> Greetings
> t.
>
> On Wed, Aug 6, 2008 at 10:54 PM, Evgeniy Polyakov <johnpol@2ka.mipt.ru> wrote:
> > Hi Tobias.
> >
> > On Wed, Aug 06, 2008 at 05:56:43PM +0200, Tobias Koeck (tobias.koeck@gmail.com) wrote:
> >> Are the hash_list rcu functions avoiding all locking problems (even
> >> the one with only one CPU)?
> >
> > What is hash list? hlist? Or list in a hash bucket?
> > Does include/linux/rculist.h contain needed bits?
> >
> >> Are there some abstract examples for the use of the hash_{head,list} structures?
> >
> > Sorry, my kernel source tree does not know what is 'hash_head'.
> > What data structure exactly do you mean?
> >
> > --
> > Evgeniy Polyakov
> >
> --
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2008-08-07 1:49 meant hlist_* - Re: hash_list and rcu locking question Tobias Koeck
2008-08-07 3:53 ` Evgeniy Polyakov
2008-08-08 22:21 ` Paul E. McKenney
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