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Re: [Open-FCoE] [PATCH] fcoe:Fix incorrect use of non wrapper version of skb_buff helper function in fcoe_percpu_recieve_thread

From Chris Leech <cleech@redhat.com>
Newsgroups linux.kernel
Subject Re: [Open-FCoE] [PATCH] fcoe:Fix incorrect use of non wrapper version of skb_buff helper function in fcoe_percpu_recieve_thread
Date 2015-09-21 22:10 +0200
Message-ID <qbfzs-8w4-5@gated-at.bofh.it> (permalink)
References <qbfzs-8w4-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Sun, Sep 20, 2015 at 06:22:39PM -0400, Nicholas Krause wrote:
> This fixes the incorrect use of the non wrapper version of the
> function skb_dequeue in fcoe_percpu_receive_thread to use the
> wrapper version as we need to protect avoid other users from
> concurrently access on the sk_buff_head tmp used as the link
> list head for this call to skb_queue.

The sk_buff_head tmp is a local reference on the stack, so not accessed
concurrently from anywhere.  It's set with skb_queue_splice_init while
holding the lock for the real fcoe_rx_list, specifically to batch
process without repeatedly taking and dropping the lock.

Nak, flawed reasoning for justification.

- Chris
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Re: [Open-FCoE] [PATCH] fcoe:Fix incorrect use of non wrapper  version of skb_buff helper function in fcoe_percpu_recieve_thread Chris Leech <cleech@redhat.com> - 2015-09-21 22:10 +0200

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