From: Greg Banks <gnb-cP1dWloDopni96+mSzHFpQC/G2K4zDHf@public.gmane.org>
To: Chuck Lever <chuck.lever@oracle.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
Linux NFS ML <linux-nfs@vger.kernel.org>
Subject: Re: [patch 10/14] sunrpc: Reorganise the queuing of cache upcalls.
Date: Sat, 10 Jan 2009 12:28:38 +1100 [thread overview]
Message-ID: <4967F9C6.1070204@melbourne.sgi.com> (raw)
In-Reply-To: <9D49048E-5F75-42A3-99C9-319A54010E64@oracle.com>
Chuck Lever wrote:
> On Jan 8, 2009, at Jan 8, 2009, 10:12 PM, Greg Banks wrote:
>>
>> a) support partial reads but do so properly: [...]
>>
>> b) don't support partial reads but require userspace to do larger full
>> reads. I don't think 100K is too much to ask.
>
> How about:
>
> c) Use an mmap like API to avoid copying 100K of data between user
> space and kernel.
I think that would be a significant complexity hit, and even at 100K the
size of the data just doesn't warrant it.
--
Greg Banks, P.Engineer, SGI Australian Software Group.
the brightly coloured sporks of revolution.
I don't speak for SGI.
next prev parent reply other threads:[~2009-01-10 1:36 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-08 8:25 [patch 00/14] sunrpc: Sunrpc cache cleanups and upcall rework Greg Banks
2009-01-08 8:25 ` [patch 01/14] sunrpc: Use consistent naming for variables of type struct cache_detail* Greg Banks
2009-01-08 8:25 ` [patch 02/14] sunrpc: Use consistent naming for variables of type struct cache_head* Greg Banks
2009-01-08 8:25 ` [patch 03/14] sunrpc: Use consistent naming for variables of type struct cache_request* Greg Banks
2009-01-08 8:25 ` [patch 04/14] sunrpc: Minor indentation cleanup in cache.c Greg Banks
2009-01-08 8:25 ` [patch 05/14] sunrpc: Rename queue_loose() to cache_remove_queued() Greg Banks
2009-01-08 8:25 ` [patch 06/14] sunrpc: Gather forward declarations of static functions in cache.c Greg Banks
2009-01-08 8:25 ` [patch 07/14] sunrpc: Make the global queue_lock per-cache-detail Greg Banks
2009-01-08 8:25 ` [patch 08/14] sunrpc: Make the global queue_wait per-cache-detail Greg Banks
2009-01-08 8:25 ` [patch 09/14] sunrpc: Remove the global lock queue_io_mutex Greg Banks
2009-01-08 8:25 ` [patch 10/14] sunrpc: Reorganise the queuing of cache upcalls Greg Banks
2009-01-08 19:57 ` J. Bruce Fields
2009-01-09 2:40 ` Greg Banks
[not found] ` <4966B92F.8060008-cP1dWloDopni96+mSzHFpQC/G2K4zDHf@public.gmane.org>
2009-01-09 2:57 ` J. Bruce Fields
2009-01-09 3:12 ` Greg Banks
[not found] ` <4966C0AB.7000604-cP1dWloDopni96+mSzHFpQC/G2K4zDHf@public.gmane.org>
2009-01-09 16:53 ` Chuck Lever
2009-01-10 1:28 ` Greg Banks [this message]
2009-01-09 21:29 ` J. Bruce Fields
2009-01-09 21:41 ` J. Bruce Fields
2009-01-09 23:40 ` Greg Banks
2009-01-09 23:29 ` Greg Banks
2009-01-08 8:25 ` [patch 11/14] sunrpc: Allocate cache_requests in a single allocation Greg Banks
2009-01-08 8:25 ` [patch 12/14] sunrpc: Centralise memory management of cache_requests Greg Banks
2009-01-08 8:25 ` [patch 13/14] sunrpc: Move struct cache_request to linux/sunrpc/cache.h Greg Banks
2009-01-08 8:25 ` [patch 14/14] sunrpc: Improve the usefulness of debug printks in the sunrpc cache code Greg Banks
2009-01-08 19:52 ` [patch 00/14] sunrpc: Sunrpc cache cleanups and upcall rework J. Bruce Fields
2009-01-09 1:42 ` Greg Banks
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