mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Ravikiran G Thirumalai <kiran@in.ibm.com>
To: Christoph Hellwig <hch@infradead.org>, Greg KH <greg@kroah.com>,
	akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [patch] Add kref_read and kref_put_last primitives
Date: Tue, 27 Jul 2004 12:39:15 +0530	[thread overview]
Message-ID: <20040727070915.GC1270@obelix.in.ibm.com> (raw)
In-Reply-To: <20040726173151.A11637@infradead.org>

On Mon, Jul 26, 2004 at 05:31:51PM +0100, Christoph Hellwig wrote:
> On Mon, Jul 26, 2004 at 08:18:56PM +0530, Ravikiran G Thirumalai wrote:
> > ...
> 
> Why don't you simply use an atomic_t if that's what you seem to
> want?
> 

struct kref does just that.  The kref api are just abstractions for 
refcounting which i presume is recommended for all refcounters in the
kernel.  I am just converting the struct file.f_count refcounter
to use kref with this patch.  

My actual intentions are to extend the kref api to do lock free refcounting 
and use that for the file.f_count refcounter, and make fd lookup lock 
free using rcu.  My earlier experiments with such patches showed 
performance improvements for threaded workloads which do lot of io.

Thanks,
Kiran

  reply	other threads:[~2004-07-27  7:10 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-07-26 14:48 Ravikiran G Thirumalai
2004-07-26 14:56 ` Ravikiran G Thirumalai
2004-07-26 16:31 ` Christoph Hellwig
2004-07-27  7:09   ` Ravikiran G Thirumalai [this message]
2004-07-27  9:43     ` Christoph Hellwig
2004-08-02 20:08   ` Greg KH
2004-08-03  5:42     ` Dipankar Sarma
2004-08-03  6:51       ` Greg KH
2004-08-03  7:45         ` Dipankar Sarma

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20040727070915.GC1270@obelix.in.ibm.com \
    --to=kiran@in.ibm.com \
    --cc=akpm@osdl.org \
    --cc=greg@kroah.com \
    --cc=hch@infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®