cvs commit: src/sys/dev/usb usb_mem.c

[Ian Dowse]

iedowse     2005-01-11 01:19:43 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_4)
    sys/dev/usb          usb_mem.c 
  Log:
  MFC: 1.6; When searching for a suitable block of memory on the free
  list, skip blocks that are too big by a factor of two or greater.
  This avoids some cases of extremely inefficient memory use that can
  occur when large (e.g. 64k) blocks on the free list get used when
  allocating a 4k chunk of 64-byte fragments. Because fragments have
  their own free list, the 60k difference got lost forever every time.
  
  Revision  Changes    Path
  1.5.4.2   +2 -1      src/sys/dev/usb/usb_mem.c