From: Christoph Hellwig <hch@infradead.org>
To: Eric Biggers <ebiggers3@gmail.com>
Cc: "Reshetova, Elena" <elena.reshetova@intel.com>,
Christoph Hellwig <hch@infradead.org>,
"axboe@kernel.dk" <axboe@kernel.dk>,
"james.bottomley@hansenpartnership.com"
<james.bottomley@hansenpartnership.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"fujita.tomonori@lab.ntt.co.jp" <fujita.tomonori@lab.ntt.co.jp>,
"mingo@redhat.com" <mingo@redhat.com>, "clm@fb.com" <clm@fb.com>,
"jbacik@fb.com" <jbacik@fb.com>,
"dsterba@suse.com" <dsterba@suse.com>
Subject: Re: [PATCH 0/5] v2: block subsystem refcounter conversions
Date: Fri, 21 Apr 2017 03:56:54 -0700 [thread overview]
Message-ID: <20170421105654.GC31499@infradead.org> (raw)
In-Reply-To: <20170420183319.GB103004@gmail.com>
On Thu, Apr 20, 2017 at 11:33:19AM -0700, Eric Biggers wrote:
> Like I suggested months ago, how about doing an efficient implementation of
> refcount_t which doesn't use the bloated cmpxchg loop? Then there would be no
> need for endless performance arguments. In fact, in PaX there are already
> example implementations for several architectures. It's unfortunate that
> they're still being ignored for some reason.
Yes. I will also NAK other conversions until this is done, which is a
bit sad as the recount_t API itself is very useful.
prev parent reply other threads:[~2017-04-21 10:56 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-20 11:27 [PATCH 0/5] v2: block subsystem refcounter conversions Elena Reshetova
2017-04-20 11:27 ` [PATCH 1/5] block: convert bio.__bi_cnt from atomic_t to refcount_t Elena Reshetova
2017-04-20 11:27 ` [PATCH 2/5] block: convert blk_queue_tag.refcnt " Elena Reshetova
2017-04-20 11:27 ` [PATCH 3/5] block: convert blkcg_gq.refcnt " Elena Reshetova
2017-04-20 11:27 ` [PATCH 4/5] block: convert io_context.active_ref " Elena Reshetova
2017-04-20 11:27 ` [PATCH 5/5] block: convert bsg_device.ref_count " Elena Reshetova
2017-04-20 13:56 ` [PATCH 0/5] v2: block subsystem refcounter conversions Christoph Hellwig
2017-04-20 16:10 ` Reshetova, Elena
2017-04-20 16:10 ` Reshetova, Elena
2017-04-20 18:33 ` Eric Biggers
2017-04-21 10:55 ` Reshetova, Elena
2017-04-21 10:55 ` Reshetova, Elena
2017-04-21 14:03 ` Jens Axboe
2017-04-21 15:22 ` Peter Zijlstra
2017-04-21 16:29 ` Jens Axboe
2017-04-21 17:11 ` Kees Cook
2017-04-21 19:55 ` Eric Biggers
2017-04-21 20:22 ` Kees Cook
2017-04-21 21:27 ` James Bottomley
2017-04-21 21:30 ` Kees Cook
2017-04-21 22:01 ` James Bottomley
2017-04-21 10:56 ` Christoph Hellwig [this message]
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