2.6.29, holidays

2.6.29, holidays

[J. Bruce Fields]

I'm leaving town till the new year.  It's likely 2.6.28 will be released
(and the 2.6.29 merge window open) on Christmas, though the merge window
will be extended to take into account the holidays:

	http://lwn.net/Articles/312154/

I'll be online at least part of the time, and review outstanding patches
from Chuck and Benny (and hopefully Steved's export patches).  If you
have other server stuff pending for 2.6.29, please remind me.

--b.

Re: 2.6.29, holidays

[Benny Halevy]

On Dec. 22, 2008, 19:11 +0200, "J. Bruce Fields" <bfields@fieldses.org> wrote:
> I'm leaving town till the new year.  It's likely 2.6.28 will be released
> (and the 2.6.29 merge window open) on Christmas, though the merge window
> will be extended to take into account the holidays:
> 
> 	http://lwn.net/Articles/312154/
> 
> I'll be online at least part of the time, and review outstanding patches
> from Chuck and Benny (and hopefully Steved's export patches).  If you
> have other server stuff pending for 2.6.29, please remind me.

Hi Bruce,

First, enjoy your vacation!
Regarding 2.6.29, how about the following patch from Alexandros?
http://git.linux-nfs.org/?p=bhalevy/linux-pnfs.git;a=commitdiff;h=35bbe2824b991e14877e7ceb6a36f91e2ea78226
I haven't sent it to you for 2.6.29 but I believe it's a good opportunity
to get it in.

Benny

> 
> --b.
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Re: 2.6.29, holidays

[J. Bruce Fields]

On Mon, Dec 22, 2008 at 08:01:40PM +0200, Benny Halevy wrote:
> On Dec. 22, 2008, 19:11 +0200, "J. Bruce Fields" <bfields@fieldses.org> wrote:
> > I'm leaving town till the new year.  It's likely 2.6.28 will be released
> > (and the 2.6.29 merge window open) on Christmas, though the merge window
> > will be extended to take into account the holidays:
> > 
> > 	http://lwn.net/Articles/312154/
> > 
> > I'll be online at least part of the time, and review outstanding patches
> > from Chuck and Benny (and hopefully Steved's export patches).  If you
> > have other server stuff pending for 2.6.29, please remind me.
> 
> Hi Bruce,
> 
> First, enjoy your vacation!
> Regarding 2.6.29, how about the following patch from Alexandros?
> http://git.linux-nfs.org/?p=bhalevy/linux-pnfs.git;a=commitdiff;h=35bbe2824b991e14877e7ceb6a36f91e2ea78226
> I haven't sent it to you for 2.6.29 but I believe it's a good opportunity
> to get it in.

Thanks, a little late, but I've applied that....

I also spent some time trying to figure out what to do about the nfs4
server's locking.  The scope of the state lock is a problem, mainly
because (at least for me) it's hard to understand what it's protecting
at this point.  And of course I worry about performance: I haven't tried
to measure lock contention, but it can't be good that the same lock that
can be held over disk access (read/write code isn't under it, but lots
of lookups and creates are) is also used for simple hash-table lookups.

I got as far as looking at nfsd4_open() and despaired.

A global spinlock or two for the various hash tables, together with a
semaphore for each stateowner, to serialize the stateid replay stuff,
might do the job.

Anyway, I committed some very minor cleanup of the open code--you can
see it at for-2.6.30, if anyone's interested, but didn't get any
further.

--b.

Re: 2.6.29, holidays

[J. Bruce Fields]

On Mon, Feb 02, 2009 at 05:58:05PM -0500, J. Bruce Fields wrote:
> On Mon, Dec 22, 2008 at 08:01:40PM +0200, Benny Halevy wrote:
> > On Dec. 22, 2008, 19:11 +0200, "J. Bruce Fields" <bfields@fieldses.org> wrote:
> > > I'm leaving town till the new year.  It's likely 2.6.28 will be released
> > > (and the 2.6.29 merge window open) on Christmas, though the merge window
> > > will be extended to take into account the holidays:
> > > 
> > > 	http://lwn.net/Articles/312154/
> > > 
> > > I'll be online at least part of the time, and review outstanding patches
> > > from Chuck and Benny (and hopefully Steved's export patches).  If you
> > > have other server stuff pending for 2.6.29, please remind me.
> > 
> > Hi Bruce,
> > 
> > First, enjoy your vacation!
> > Regarding 2.6.29, how about the following patch from Alexandros?
> > http://git.linux-nfs.org/?p=bhalevy/linux-pnfs.git;a=commitdiff;h=35bbe2824b991e14877e7ceb6a36f91e2ea78226
> > I haven't sent it to you for 2.6.29 but I believe it's a good opportunity
> > to get it in.
> 
> Thanks, a little late,

(By which I mean, I'm a little late, obviously your mail wasn't.)

--b.

> but I've applied that....
> 
> I also spent some time trying to figure out what to do about the nfs4
> server's locking.  The scope of the state lock is a problem, mainly
> because (at least for me) it's hard to understand what it's protecting
> at this point.  And of course I worry about performance: I haven't tried
> to measure lock contention, but it can't be good that the same lock that
> can be held over disk access (read/write code isn't under it, but lots
> of lookups and creates are) is also used for simple hash-table lookups.
> 
> I got as far as looking at nfsd4_open() and despaired.
> 
> A global spinlock or two for the various hash tables, together with a
> semaphore for each stateowner, to serialize the stateid replay stuff,
> might do the job.
> 
> Anyway, I committed some very minor cleanup of the open code--you can
> see it at for-2.6.30, if anyone's interested, but didn't get any
> further.
> 
> --b.
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