Hi, On Mon, Feb 18, 2013 at 09:49:16AM -0800, Greg KH wrote: > > Input/output error - /sys/devices/cpu/power/autosuspend_delay_ms > > The issue with this file is, if the power.use_autosuspend flag is not > set for the device, then it can't be read or written to. This flag > changes dynamically with the system state > (__pm_runtime_use_autosuspend() can change it), so we can't just not > show the file if the flag is not set properly, sorry. > > So the "error" is correct here, as is the 0644 file value. hmm... we could create the file at pm_runtime_enable() time and remove it on pm_runtime_disable() time, no ? Addin Rafael to Cc > > No such device or address - /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1.1/2-5.1.1:1.0/host100/target100:0:0/100:0:0:0/block/sdc/trace/pid > > No such device or address - /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1.1/2-5.1.1:1.0/host100/target100:0:0/100:0:0:0/block/sdc/trace/end_lba > > No such device or address - /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1.1/2-5.1.1:1.0/host100/target100:0:0/100:0:0:0/block/sdc/trace/enable > > No such device or address - /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1.1/2-5.1.1:1.0/host100/target100:0:0/100:0:0:0/block/sdc/trace/act_mask > > No such device or address - /sys/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1.1/2-5.1.1:1.0/host100/target100:0:0/100:0:0:0/block/sdc/trace/start_lba > > Invalid argument - /sys/devices/pci0000:00/0000:00:1f.2/ata2/host1/scsi_host/host1/em_buffer > > Invalid argument - /sys/devices/pci0000:00/0000:00:1f.2/ata2/host1/target1:0:0/1:0:0:0/sw_activity > > Operation not supported - /sys/devices/pci0000:00/0000:00:1f.2/ata2/host1/target1:0:0/1:0:0:0/unload_heads > > SCSI fun, go poke the SCSI developers about these files, I know nothing > about them, nor do I really want to :) > > > No such device - /sys/devices/system/edac/mc/mc0/sdram_scrub_rate > > Odd, go ask the edac developers will do ;-) > > Input/output error - /sys/devices/system/memory/soft_offline_page > > Input/output error - /sys/devices/system/memory/hard_offline_page > > These both should be mode 0400, not 0644, they have no 'show' attribute, > that's a bug, care to make up a patch that I can take? Or I can, let me > know. sure, will send in a bit. > > Invalid argument - /sys/devices/virtual/net/lo/speed > > Invalid argument - /sys/devices/virtual/net/lo/duplex > > Ask the network developers, odds are, the loopback device doesn't really > have a speed :) right ;-) > > No such device or address - /sys/devices/virtual/block/loop0/trace/pid > > No such device or address - /sys/devices/virtual/block/loop0/trace/end_lba > > No such device or address - /sys/devices/virtual/block/loop0/trace/enable > > No such device or address - /sys/devices/virtual/block/loop0/trace/act_mask > > No such device or address - /sys/devices/virtual/block/loop0/trace/start_lba > > Hm, these show up for virtual block devices as well, maybe they aren't > scsi specific, but rather block specific, go poke the block developers > then. yeah, I was looking into these a while ago. They're created by blk_trace_init_sysfs() which is called by blk_register_queue() but I wonder if we couldn't defer the creation of those so that: sysfs_blk_trace_attr_show(): 1639 bdev = bdget(part_devt(p)); 1640 if (bdev == NULL) 1641 goto out; 1642 1643 q = blk_trace_get_queue(bdev); 1644 if (q == NULL) 1645 goto out_bdput; never fail (meaning they could be removed), adding some block folks to the loop. -- balbi
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