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    SubjectRe: generic_make_request fucntion for scsi_disk
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    Sorry My mistake.
    I will take care of it now onwards
    regards
    Ravish


    On Sat, Jun 20, 2009 at 8:26 PM, Alan Stern<stern@rowland.harvard.edu> wrote:
    > You should use Reply-To-All so that other people reading the mailing
    > list will be able to follow and contribute to the thread.
    >
    > On Sat, 20 Jun 2009, Ravish Tayal wrote:
    >
    >> Thanks Alan,
    >>
    >> I am actually trying to profile the time taken by each layer to complete the
    >> disk write opertaion as sys_write to queue_command invokation veries alot.
    >
    > Of course it varies.  The kernel buffers disk writes, shuffles them
    > around, and then carries them out when it wants to.  As James has
    > pointed out, your write(2) system calls don't directly cause any I/O to
    > take place.
    >
    > Alan Stern
    >
    >
    >
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