From: Davidlohr Bueso <dave@stgolabs.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: jbaron@akamai.com, viro@zeniv.linux.org.uk,
linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH -next 0/2] fs/epoll: loosen irq safety when possible
Date: Sat, 21 Jul 2018 10:21:20 -0700 [thread overview]
Message-ID: <20180721172120.kbdu4euc2wn4xzgf@linux-r8p5> (raw)
In-Reply-To: <20180720134429.1ba61018934b084bb2e17bdb@linux-foundation.org>
On Fri, 20 Jul 2018, Andrew Morton wrote:
>We could open-code it locally. Add a couple of
>WARN_ON_ONCE(irqs_disabled())? That might need re-benchmarking with
>Xen but surely just reading the thing isn't too expensive?
We could also pass on the responsibility to lockdep and just use
lockdep_assert_irqs_disabled(). But I guess that would be less effective
than to just open code it in epoll without lockdep -- note that over 80
places in the kernel do this.
Thanks,
Davidlohr
next prev parent reply other threads:[~2018-07-21 17:21 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-20 17:29 [PATCH -next 0/2] fs/epoll: loosen irq safety when possible Davidlohr Bueso
2018-07-20 17:29 ` [PATCH 1/2] fs/epoll: loosen irq safety in ep_scan_ready_list() Davidlohr Bueso
2018-07-20 17:29 ` [PATCH 2/2] fs/epoll: loosen irq safety in epoll_insert() and epoll_remove() Davidlohr Bueso
2018-07-20 19:42 ` [PATCH -next 0/2] fs/epoll: loosen irq safety when possible Andrew Morton
2018-07-20 20:05 ` Davidlohr Bueso
2018-07-20 20:44 ` Andrew Morton
2018-07-21 0:22 ` Davidlohr Bueso
2018-07-21 17:21 ` Davidlohr Bueso [this message]
2018-07-21 17:39 ` Peter Zijlstra
2018-07-21 18:31 ` Davidlohr Bueso
2018-07-24 23:43 ` Andrew Morton
2018-09-06 19:11 ` Peter Zijlstra
2018-09-06 20:55 ` Davidlohr Bueso
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