fedora 22 cinnamon dmesg memory problem
This query is probably more appropriately directed to a cinnamon or cinnamon-fedora forum, if any. However, I'll probably have better luck at this forum.
Boot disk recently died; decided to recover by re-installing everything, starting with Fedora 22 Live. kde proved problematic so switched to cinnamon. Several months ago, while using Fedora 22 with kde4, I researched how to make an external hard disk bootable. One of the steps was to find the device node assigned to the drive.
dmesg | tail
...
[ 4783.165535] sd 6:0:0:0: [sdc] Attached SCSI disk
device node = sdc
...
Today, I'm under fedora 22 64 bit with cinnamon 2.6.13, 16gb memory. I inserted a hard disk to my usb connected docking station (device sdd). Cinnamon automatically mounted it; I then unmounted the drive, leaving it still assigned to device sdd. Then:
dmesg
...
[ 474.183592] scsi 7:0:0:0: Direct-Access WDC WD30 EZRX-00DC0B0 PQ: 0 ANSI: 5
[ 474.185430] sd 7:0:0:0: [sdd] Very big device. Trying to use READ CAPACITY(16).
[ 474.185608] sd 7:0:0:0: [sdd] 5860533168 512-byte logical blocks: (3.00 TB/2.73 TiB)
[ 474.185861] sd 7:0:0:0: [sdd] Write Protect is off
[ 474.185864] sd 7:0:0:0: [sdd] Mode Sense: 28 00 00 00
[ 474.186112] sd 7:0:0:0: [sdd] No Caching mode page found
[ 474.186115] sd 7:0:0:0: [sdd] Assuming drive cache: write through
[ 474.186293] sd 7:0:0:0: Attached scsi generic sg4 type 0
[ 474.188831] sd 7:0:0:0: [sdd] Very big device. Trying to use READ CAPACITY(16).
[ 474.274863] sdd: sdd1 sdd2
[ 474.275939] sd 7:0:0:0: [sdd] Very big device. Trying to use READ CAPACITY(16).
[ 474.276534] sd 7:0:0:0: [sdd] Attached SCSI disk
[ 840.116816] DMA-API: debugging out of memory - disabling
[ 920.589012] kworker/dying (16) used greatest stack depth: 10848 bytes left
[ 1093.678988] kworker/dying (6) used greatest stack depth: 10672 bytes left
[ 1223.786129] usb 3-10: USB disconnect, device number 5
The heading lines from the top command (executed as the super user) are:
top - 08:38:49 up 26 min, 2 users, load average: 0.00, 0.07, 0.17
Tasks: 224 total, 1 running, 223 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.8 us, 0.5 sy, 0.0 ni, 98.4 id, 0.2 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 16271316 total, 14042704 free, 1125872 used, 1102740 buff/cache
KiB Swap: 8191996 total, 8191996 free, 0 used. 14745112 avail Mem
Questions
(In linux-newbie terms) what does this message mean: "DMA-API: debugging out of memory - disabling"?
Why is there no "device node = sdd" message in the dmesg output? Does it relate to the "debugging ... memory..." message?
With 16gb memory, I installed from Fedora 22 Live without making any effort to tweak my memory settings. Do the memory lines from the top command indicate a ...
