From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>,
Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
RT <linux-rt-users@vger.kernel.org>
Subject: Re: [rfc patch] drivers/block/zram: Replace bit spinlocks with rtmutex for -rt
Date: Mon, 4 Apr 2016 09:27:57 +0900 [thread overview]
Message-ID: <20160404002756.GA6164@swordfish> (raw)
In-Reply-To: <20160401104221.GB29603@linutronix.de>
On (04/01/16 12:42), Sebastian Andrzej Siewior wrote:
> >They're nondeterministic, and lead to ___might_sleep() splats in -rt.
> >OTOH, they're a lot less wasteful than an rtmutex per page.
> Applied.
> Although I'm disapointed about Sergey's argument against the spinlock in
> general due to a few bytes used by lockdep which can be disabled. Not to
> mention the usefull debug facility lockdep provides if one decides to
> use.
I'll take a look.
-ss
prev parent reply other threads:[~2016-04-04 0:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-22 10:19 [rfc patch] drivers/block/zram: Replace bit spinlocks with rtmutex for -rt Mike Galbraith
2016-03-22 10:34 ` Mike Galbraith
2016-03-30 8:56 ` Sebastian Andrzej Siewior
2016-03-30 9:13 ` Sergey Senozhatsky
2016-03-30 9:19 ` Sebastian Andrzej Siewior
2016-03-30 9:23 ` Mike Galbraith
2016-03-31 2:08 ` Mike Galbraith
2016-04-01 10:42 ` Sebastian Andrzej Siewior
2016-04-04 0:27 ` Sergey Senozhatsky [this message]
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