A proper way to yield for interactive tasks

From: emmanuel ALLAUD (eallaud_at_yahoo.fr)
Date: 09/24/03

  • Next message: Stephen Smalley: "[RFC][PATCH] Pass nameidata to security_inode_permission hook" 
    Date:	Wed, 24 Sep 2003 18:09:48 +0200 (CEST)
To: linux-kernel@vger.kernel.org

        Hi all,
    this way was brought on the XFree-devel list : say you
    have a video driver which wants to feed a video card
    using DMA (in general using big chunks ~1MB for
    performance reasons). Once the buffer is filled up,
    you know this will take time to be processed by the
    card, so you want to release the CPU, but you don't
    want to wait too long for getting the CPU back for
    interactivity reason. People are using sched_yield for
    now (not all I guess), is that the good solution?
    I must add that this is all in user-space, and the DMA
    case is not the only case where we need to yield but
    not too long.
    I have seen things related in the archives but I did
    not find something clear on that matter.
    TIA
    Bye
    Manu

    PS : could you please CC me, I am not subscribed to
    this list (and my mailbox is already crowded ;-)

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  • Next message: Stephen Smalley: "[RFC][PATCH] Pass nameidata to security_inode_permission hook"

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