Re: [PATCH net-next 00/19] IPVS optimizations, part 2

To: Julian Anastasov <ja@xxxxxx>
Subject: Re: [PATCH net-next 00/19] IPVS optimizations, part 2
Cc: lvs-devel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx
From: Simon Horman <horms@xxxxxxxxxxxx>
Date: Thu, 28 Mar 2013 14:41:28 +0900
On Fri, Mar 22, 2013 at 11:46:35AM +0200, Julian Anastasov wrote:
>       This is the second patchset with IPVS optimizations.
> Now we convert the schedulers, dests and services to RCU.
>       All patches are for net-next based on the first
> patchset v3. The idea is after discussion and review Simon to
> apply the patchset after a week or so to ipvs-next tree.
>       The changes in this patchset eliminate global locks
> from packet processing by using RCU. There are more details
> in the patches.
>       After this patchset the situation is as follows:
> - dests:
>       - lookups under RCU lock allow ip_vs_dest_hold, used
>       for binding dest to conn or to select dest by scheduler
>       - dests are freed by dest_trash code long after grace period
> - services:
>       - no global read_lock
>       - lookups under RCU lock allow scheduler to select
>       dests under RCU lock
>       - grace period implemented with IP_VS_WAIT_WHILE is
>       gone allowing scheduler's dest selection and scheduler
>       reconfiguration to run in parallel
> - schedulers:
>       - schedule method runs under RCU lock, needs _rcu
>       if using svc->destinations, needs _bh suffix to locks
>       because it can be called in LOCAL_OUT hook
>       - when dest is added, the add_dest method is called
>       instead of update_service
>       - when dest is deleted, the del_dest method is called
>       instead of update_service
>       - when dest is updated, the upd_dest method is called
>       instead of update_service
>       - scheduler can hold dests in its state long after they are
>       unlinked from svc, even without providing del_dest handler.
>       But such dests must not be returned by the
>       schedule method (needs IP_VS_DEST_F_AVAILABLE check)
>       - sched_data must be freed after grace period and
>       module exit should be delayed with synchronize_rcu
>       to wait all RCU read-side critical sections to
>       complete
> - BH:
>       - we do not disable BHs in LOCAL_OUT and sync code anymore
>       - _bh suffixes are added to all places that need them,
>       except timer handlers

Hi Julian,

what is the status of this series?

N.B: THis series is different to "[PATCH 00/15 v3] IPVS optimizations (repost)"
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