lkml.org 
[lkml]   [2012]   [Feb]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] hrtimers: Special-case zero length sleeps
    On Wed, Feb 15, 2012 at 08:47:57PM +0000, Matthew Garrett wrote:

    > Ok. I'll work on finding how prevelant it is and see if we can kill it
    > off in userspace.

    Checking through an exploded Fedora kernel tree suggests around 125
    packages out of 11000 or so, so around 1% of userspace seems to use
    sleep(0) under certain circumstances. We can probably fix everything in
    the distribution, but that suggests that there's also going to be a
    significant amount of code in the outside world that's also broken.

    Userspace clearly has an expectation that sleep(0) is magic in some
    ill-defined way. We'd be well within our rights to break that
    expectation, but I think it's common enough to warrant special casing.

    --
    Matthew Garrett | mjg59@srcf.ucam.org


    \
     
     \ /
      Last update: 2012-02-16 15:29    [W:0.020 / U:31.844 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site