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From: Jonathan Cameron <jic23@cam.ac.uk>
To: Ge Gao <ggao@invensense.com>, Jonathan Cameron <jic23@kernel.org>
Cc: linux-iio@vger.kernel.org
Subject: Re: sw_ring.c poll problem
Date: Wed, 16 May 2012 06:46:44 +0100	[thread overview]
Message-ID: <9d0339d0-2cde-4605-a8b0-99f568d05eb8@email.android.com> (raw)
In-Reply-To: <6e6a0f27b1900226df5350cc320f25bb@mail.gmail.com>



Ge Gao <ggao@invensense.com> wrote:

>Dear all,
>	I found that ring_sw.c the poll function has to read half of the
>data for poll to work. Basically, you have to fill half of the ring
>buffer
>in order for poll to be triggrerred. You have to also read more than
>half
>of the data for poll to be disappeared. This would pose problems. If
>you
>have big ring buffer, the data will lost its immediacy. If you have
>small
>ring buffer, the data could lost if not buffered enough. Is that
>possible
>this poll action configurable? Or I missed anything.

Use kfifobuf instead. Sw _ring is going away anyway.
>	Thanks.
>
>Best regards,
>
>Ge GAO
>--
>To unsubscribe from this list: send the line "unsubscribe linux-iio" in
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-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

  reply	other threads:[~2012-05-16  5:46 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-16  1:26 sw_ring.c poll problem Ge Gao
2012-05-16  5:46 ` Jonathan Cameron [this message]
2012-05-16  7:15   ` Jonathan Cameron
2012-05-16 17:16     ` Ge Gao
2012-05-18  1:08     ` Ge Gao
2012-05-18 17:30       ` Jonathan Cameron
2012-05-18 18:26         ` Ge Gao
2012-05-19  9:16           ` Jonathan Cameron
2012-05-19  9:41             ` Lars-Peter Clausen
2012-05-19  9:50               ` Jonathan Cameron
2012-05-19 10:43                 ` Lars-Peter Clausen
2012-05-19 14:12                   ` Jonathan Cameron
2012-05-19 14:21                     ` Jonathan Cameron
2012-05-21 17:03                   ` Ge Gao
2012-05-18 19:27         ` Ge Gao
2012-05-19  9:18           ` Jonathan Cameron

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