To: Matthew Wilcox <matthew@wil.cx>
Cc: "William A.(Andy) Adamson" <andros@citi.umich.edu>,
       Stephen Rothwell <sfr@canb.auug.org.au>,
       Michael Kerrisk <mtk-lkml@gmx.net>, heiko.carstens@de.ibm.com,
       linux-kernel@vger.kernel.org, schwidefsky@de.ibm.com,
       michael.kerrisk@gmx.net, andros@citi.umich.edu
Subject: Re: fcntl: F_SETLEASE/F_RDLCK question 
In-reply-to: <20050503135946.GC19678@parcelfarce.linux.theplanet.co.uk> 
References: <20050502210411.06226103.sfr@canb.auug.org.au> 
 <2606.1115114418@www14.gmx.net> <20050503231408.7c045648.sfr@canb.auug.org.au>
  <20050503135542.BFBC61BB0E@citi.umich.edu> <20050503135946.GC19678@parcelfarce.linux.theplanet.co.uk>
Comments: In-reply-to Matthew Wilcox <matthew@wil.cx>
   message dated "Tue, 03 May 2005 14:59:46 +0100."
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Date: Tue, 03 May 2005 10:15:52 -0400
From: "William A.(Andy) Adamson" <andros@citi.umich.edu>
Message-Id: <20050503141552.F42371BAD1@citi.umich.edu>
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> On Tue, May 03, 2005 at 09:55:42AM -0400, William A.(Andy) Adamson wrote:
> > i believe the current implementation is correct. opening a file for write 
> > means that you can not have a read lease, caller included.
> 
> Why not?  Certainly, others will not be able to take out a read lease,
> so there's very little point to only having a read lease, but I don't
> see why we should deny it.
> 

by definition: a read lease means there are no writers. so, the question is 
not 'why not', the question is why? why hand out a read lease to an open for 
write?

-->Andy

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