netdev - Re: Question on ptr

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Message-ID: <CAF8QhUhSWauyg2a1Y_MjP0gk-W9oydbpuBvtZyGZEbfmm8+mQA@mail.gmail.com>
Date:   Thu, 31 Jan 2019 13:16:31 +0800
From:   fei phung <feiphung27@...il.com>
To:     mst@...hat.com, feiphung@...mail.com, netdev@...r.kernel.org
Subject: Re: Question on ptr_ring linux header

Hi,

/*
 * Filename: circ_ring.c
 * Version: 1.0
 * Description: A circular buffer using API from
 * https://github.com/torvalds/linux/blob/master/include/linux/ptr_ring.h
 */

ptr_ring's void** queue is just giving data race problem, running
consume() together with [assignment of pointers+produce()] will
definitely give rise to data race

mutex or lock cannot help in this case. Please correct me if wrong

Regards,
Phung