[lkml]   [2011]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [GIT PULL] Queue free fix (was Re: [PATCH] block: Free queue resources at blk_release_queue())
    On Wed, Sep 28, 2011 at 02:09:05PM -0400, Vivek Goyal wrote:
    > I had thought of implementing a separate lock for throttling. Then I
    > noticed few operations like checking for queue flags where I would
    > be required to hold queue locks.

    Can you do a writeup of these issues? E.g. if the flags are throtteling
    specific we can move them to a separate flags field, if not we can
    see if we can make them atomic or similar.

    Right now on high iops device queue_lock is the major killer for
    performance. It's one major reason (*) why a lot of the high iops devices
    are all moving to ->make_request, which has other issues.

    (*) others are struct request allocation and the pointless merge hash

     \ /
      Last update: 2011-09-28 20:19    [W:0.018 / U:71.480 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site