From: Kent Overstreet <kmo@daterainc.com>
To: Alexander Gordeev <agordeev@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>, Jens Axboe <axboe@kernel.dk>,
"Nicholas A. Bellinger" <nab@linux-iscsi.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/5] percpu_ida: Move waking up waiters out of atomic contexts
Date: Mon, 28 Oct 2013 14:21:40 -0700 [thread overview]
Message-ID: <20131028212140.GG8153@kmo> (raw)
In-Reply-To: <20131028100522.GC5744@dhcp-26-207.brq.redhat.com>
On Mon, Oct 28, 2013 at 11:05:25AM +0100, Alexander Gordeev wrote:
> Currently percpu_ida_free() waikes up waiters always with local
> interrupts disabled and sometimes with pool->lock held. Yet, it
> does not appear there is any reason why it could not be done out
> of these atomic contexts.
This should be a noticable performance boost, nested irqsave/restore is painful.
Acked-by: Kent Overstreet <kmo@daterainc.com>
next prev parent reply other threads:[~2013-10-28 21:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1382950629.git.agordeev@redhat.com>
2013-10-28 10:05 ` [PATCH 1/5] percpu_ida: Fix data race on cpus_have_tags cpumask Alexander Gordeev
2013-10-28 21:20 ` Kent Overstreet
2013-10-28 10:05 ` [PATCH 2/5] percpu_ida: Move waking up waiters out of atomic contexts Alexander Gordeev
2013-10-28 21:21 ` Kent Overstreet [this message]
2013-10-28 10:05 ` [PATCH 3/5] percpu_ida: Optimize freeing tags when maximum cache size is 1 Alexander Gordeev
2013-10-28 10:06 ` [PATCH 4/5] percpu_ida: Sanity check initialization parameters Alexander Gordeev
2013-10-28 10:06 ` [PATCH 5/5] percpu_ida: Allow variable maximum number of cached tags Alexander Gordeev
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