[Bug 193465] New: [mips] malloc failures on mips, ath(4)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193465

            Bug ID: 193465
           Summary: [mips] malloc failures on mips, ath(4)
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: mips
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: sbruno at FreeBSD.org
                CC: adrian at freebsd.org, alc at FreeBSD.org,
                    delphij at FreeBSD.org, jmg at FreeBSD.org

Created attachment 147072
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=147072&action=edit
r269962 vmstat -z output on my mips32 router.

It looks like svn r269963 removed a series of #if PAGE_SIZE checks that are
tripping up mips boards that have a substantially small amount of RAM(64M in my
case).

Reverting the removal of the #if PAGE_SIZE checks in kern_malloc.c is enough to
alleviate this error.  I have also included some very strange vmstat -z output
where I've captured at 269962 and then at 269963 that shows, at 269963, almost
all allocation to be in the 16k buckets where 269962 doesn't have any
allocation entry above 4k.

ath(4) is unable to malloc dma'able memory on initialization and causes a hard
deadlock waiting in kmem_arena (as shown by ctrl-t on serial console).

wlan: <802.11 Link Layer>
pci0: driver added
found->    vendor=0x168c, dev=0x002a, revid=0x01
    domain=0, bus=0, slot=0, func=0
    class=02-80-00, hdrtype=0x00, mfdev=0
    cmdreg=0x0146, statreg=0x0010, cachelnsz=0 (dwords)
    lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
    intpin=a, irq=255
    MSI-X supports 1 message in map 0x10
pci0:0:0:0: reprobing on driver added
ath0: <Atheros 9280> at device 0.0 on pci0
ath0: Lazy allocation of 0x10000 bytes rid 0x10 type 3 at 0x10000000
ath0: ath_pci_attach: looking up firmware @ 'pcib.0.bus.0.0.0.eeprom_firmware'
ath0: ath_pci_attach: EEPROM firmware @ 0xc6eef000
ath0: malloc of tx buffers failed, size 139264
ath0: malloc of rx buffers failed, size 139264
ath0: [HT] enabling HT modes
ath0: [HT] 1 stream STBC receive enabled
ath0: [HT] 1 stream STBC transmit enabled
ath0: [HT] 2 RX streams; 2 TX streams
ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps
36Mbps 48Mbps 54Mbps
ath0: 2T2R
ath0: 11ng MCS 20MHz
ath0: MCS 0-7: 6.5Mbps - 65Mbps
ath0: MCS 8-15: 13Mbps - 130Mbps
ath0: 11ng MCS 40MHz:
ath0: MCS 0-7: 13.5Mbps - 135Mbps
ath0: MCS 8-15: 27Mbps - 270Mbps
ath0: 11ng MCS 40MHz SGI:
ath0: MCS 0-7: 15Mbps - 150Mbps
ath0: MCS 8-15: 30Mbps - 300Mbps
ath0: AR9280 mac 128.2 RF5133 phy 13.0
ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0
ath0: Use hw queue 1 for WME_AC_BE traffic
ath0: Use hw queue 0 for WME_AC_BK traffic
ath0: Use hw queue 2 for WME_AC_VI traffic
ath0: Use hw queue 3 for WME_AC_VO traffic
ath0: Use hw queue 8 for CAB traffic
ath0: Use hw queue 9 for beacons
ath0: using multicast key search
load: 0.97  cmd: kldload 48 [kmem arena] 53.66r 0.00u 0.01s 0% 1552k

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