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Date: Tue, 25 Sep 2012 08:24:04 +0530
From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Organization: IBM
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To: David Rientjes <rientjes@google.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Konrad Rzeszutek Wilk <konrad@kernel.org>,
        Dave Jones <davej@redhat.com>,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
        Suzuki Poulose <suzuki@in.ibm.com>
Subject: Re: [patch for-3.6] fs, debugfs: fix race in u32_array_read and allocate
 array at open
References: <CA+55aFxd08idQXqm+JJ6xD+uzX_f7Qa25zFHb-eWBRQcEDPhkg@mail.gmail.com> <20120918192338.GA25845@phenom.dumpdata.com> <CA+55aFy6=1vW4CN0_g8BgSKKdxZNZj9Yd2WG=0BFKjish=Vw=g@mail.gmail.com> <20120918203713.GB19300@phenom.dumpdata.com> <CA+55aFzZvFeCLF8fw=NYFN7C_8ObwJMeK13bN8xRodKQ0QJkTQ@mail.gmail.com> <20120919191652.GA14631@phenom.dumpdata.com> <alpine.DEB.2.00.1209191427460.6273@chino.kir.corp.google.com> <alpine.DEB.2.00.1209191438200.21378@chino.kir.corp.google.com> <505A7F75.8000405@linux.vnet.ibm.com> <alpine.DEB.2.00.1209191938490.10953@chino.kir.corp.google.com> <20120920211814.GB27312@konrad-lan.dumpdata.com> <alpine.DEB.2.00.1209210216000.18230@chino.kir.corp.google.com> <505C3FEB.7030606@linux.vnet.ibm.com> <alpine.DEB.2.00.1209241526030.4318@chino.kir.corp.google.com>
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On 09/25/2012 03:56 AM, David Rientjes wrote:
> On Fri, 21 Sep 2012, Raghavendra K T wrote:
>
>> I think you meant we can read data only once. second time onwards we don't see
>> any data. (except when fd is forked by child/ races in
>> threads).
>>
>
> You can read(2) as many times as you want after it's opened and will get
> persistent data.
>
>

Okay, Sorry for the noise.