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Message-ID: <563a732e0912030053p15921eb6u38e8986695a7423b@mail.gmail.com> Date: Thu, 3 Dec 2009 16:53:29 +0800 From: liu pf <kernelfans@...il.com> To: Dmitry Torokhov <dmitry.torokhov@...il.com> Cc: Arjan van de Ven <arjan@...radead.org>, linux-kernel@...r.kernel.org Subject: Re: Should we use preempt_disable() in sleep_on_common()? Thank you very much On Thu, Dec 3, 2009 at 4:22 PM, Dmitry Torokhov <dmitry.torokhov@...il.com> wrote: > On Thu, Dec 03, 2009 at 04:15:49PM +0800, liu pf wrote: >> On Thu, Dec 3, 2009 at 3:12 PM, Dmitry Torokhov >> <dmitry.torokhov@...il.com> wrote: >> > On Wed, Dec 02, 2009 at 11:07:46PM -0800, Arjan van de Ven wrote: >> >> On Thu, 3 Dec 2009 14:49:14 +0800 >> >> liu pf <kernelfans@...il.com> wrote: >> >> >> >> > Hi: >> >> > >> >> > I am puzzled with the following scenario. Could anyone enlighten me? >> >> >> >> >> >> sleep_on family of APIs is very racy and just cannot be used correctly; >> >> I'm not surprised that there's a preempt race in it, but trust me, it's >> >> not the biggest race... never ever use these APIs!!! >> >> >> >> >> > >> > BTW, why do we still have them? I checked couple and they don't seem to >> > be used... >> > >> > -- >> > Dmitry >> > >> >> Hi, what is the substitution for sleep_on family of APIs? Any sample code? >> > > wait_event() and friends. Just look up any non-ancient driver. > > -- > Dmitry > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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