[Lustre-devel] [RFC] parallel enqueue

Eric Barton eeb at sun.com
Mon Feb 11 15:07:42 PST 2008

This sounds great!

But are there any livelock issues? 

> -----Original Message-----
> From: lustre-devel-bounces at lists.lustre.org 
> [mailto:lustre-devel-bounces at lists.lustre.org] On Behalf Of 
> Alex Zhuravlev
> Sent: 08 February 2008 3:32 PM
> To: lustre-devel at lists.lustre.org
> Subject: [Lustre-devel] [RFC] parallel enqueue
> Hi,
> in some cases (truncate, append) we still use serialized enqueue
> when all locks have to be enqueued synchronously one by one.
> what if we could mark all locks issued by single client with some
> unique tag (timestamp + nid?), then enqueue them all and then, in
> case of conflict, in blocking ast handler compare tag of conflicting
> lock with own tag, cancel our granted locks if our tag is greater
> than tag of conflicting lock and enqueue them again?
> thanks, Alex
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