linux-kernel - Re: [PATCH v2 00/15] Lockd: grace period containerization

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Date:	Mon, 30 Jul 2012 14:03:57 +0400
From:	Stanislav Kinsbursky <skinsbursky@...allels.com>
To:	"J. Bruce Fields" <bfields@...ldses.org>
CC:	"linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
	"Trond.Myklebust@...app.com" <Trond.Myklebust@...app.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...nvz.org" <devel@...nvz.org>
Subject: Re: [PATCH v2 00/15] Lockd: grace period containerization

28.07.2012 01:54, J. Bruce Fields пишет:
> On Wed, Jul 25, 2012 at 04:55:45PM +0400, Stanislav Kinsbursky wrote:
>> Bruce, I feel this patch set is ready for inclusion.
>>
>> v2:
>> 1) Rebase on Bruce's "for-3.6" branch.
>>
>> This patch set makes grace period and hosts reclaiming network namespace
>> aware.
>
> On a quick skim--yes, that looks reasonable to me.
>
> It doesn't help with active/active cluster exports, because in that case
> we need some additional coordination between nfsd's.
>
> But it looks good enough to handle the case where each filesystem is
> exported from at most one server at a time, which is more than we
> currently handle.
>
> It's a little late for 3.6.  Also I get the impression Al Viro has some
> lockd rework in progress, which we may want to wait for.
>
> So I'll likely look again into queueing this up for 3.7 once 3.6-rc1 is
> out.


Ok.
Will Al Viro's lockd rework be a part of 3.6 kernel?


>
> --b.
>
>>
>> Main ideas:
>> 1)  moving of
>>
>> 	unsigned long next_gc;
>> 	unsigned long nrhosts;
>>
>> 	struct delayed_work grace_period_end;
>> 	struct lock_manager lockd_manager;
>> 	struct list_head grace_list;
>>
>> to per-net Lockd data.
>>
>> 2) moving of
>>
>> 	struct lock_manager nfsd4_manager;
>>
>> to per-net NFSd data.
>>
>> 3) shutdown + gc of NLM hosts done now network namespace aware.
>>
>> 4) restart_grace() now works only for init_net.
>>
>> The following series implements...
>>
>> ---
>>
>> Stanislav Kinsbursky (15):
>>        LockD: mark host per network namespace on garbage collect
>>        LockD: make garbage collector network namespace aware.
>>        LockD: manage garbage collection timeout per networks namespace
>>        LockD: manage used host count per networks namespace
>>        Lockd: host complaining function introduced
>>        Lockd: add more debug to host shutdown functions
>>        LockD: manage grace period per network namespace
>>        LockD: make lockd manager allocated per network namespace
>>        NFSd: make nfsd4_manager allocated per network namespace context.
>>        SUNRPC: service request network namespace helper introduced
>>        LockD: manage grace list per network namespace
>>        LockD: pass actual network namespace to grace period management functions
>>        Lockd: move grace period management from lockd() to per-net functions
>>        NFSd: make grace end flag per network namespace
>>        NFSd: make boot_time variable per network namespace
>>
>>
>>   fs/lockd/grace.c            |   16 +++++--
>>   fs/lockd/host.c             |   92 ++++++++++++++++++++++++++------------
>>   fs/lockd/netns.h            |    7 +++
>>   fs/lockd/svc.c              |   43 ++++++++++--------
>>   fs/lockd/svc4proc.c         |   13 +++--
>>   fs/lockd/svclock.c          |   16 +++----
>>   fs/lockd/svcproc.c          |   15 ++++--
>>   fs/lockd/svcsubs.c          |   19 +++++---
>>   fs/nfs/callback_xdr.c       |    4 +-
>>   fs/nfsd/export.c            |    4 +-
>>   fs/nfsd/netns.h             |    4 ++
>>   fs/nfsd/nfs4idmap.c         |    4 +-
>>   fs/nfsd/nfs4proc.c          |   18 ++++---
>>   fs/nfsd/nfs4state.c         |  104 ++++++++++++++++++++++++-------------------
>>   fs/nfsd/state.h             |    4 +-
>>   include/linux/fs.h          |    5 +-
>>   include/linux/lockd/lockd.h |    6 +-
>>   include/linux/sunrpc/svc.h  |    2 +
>>   18 files changed, 231 insertions(+), 145 deletions(-)
>>


-- 
Best regards,
Stanislav Kinsbursky
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