• Mark Johnston's avatar
    Group per-domain reservation data in the same structure. · fe6d5344
    Mark Johnston authored
    We currently have the per-domain partially populated reservation queues
    and the per-domain queue locks.  Define a new per-domain padded
    structure to contain both of them.  This puts the queue fields and lock
    in the same cache line and avoids the false sharing within the old queue
    Also fix field packing in the reservation structure.  In many places we
    assume that a domain index fits in 8 bits, so we can do the same there
    as well.  This reduces the size of the structure by 8 bytes.
    Update some comments while here.  No functional change intended.
    Reviewed by:	dougm, kib
    MFC after:	2 weeks
    Sponsored by:	The FreeBSD Foundation
    Differential Revision:	https://reviews.freebsd.org/D22391