On Tue, Aug 9, 2016 at 9:01 PM, Joe Lawrence <joe.lawrence@xxxxxxxxxx> wrote: > Add descriptions for dax, io_poll, and write_same_max_bytes files. > > Signed-off-by: Joe Lawrence <joe.lawrence@xxxxxxxxxx> > --- > Documentation/block/queue-sysfs.txt | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/Documentation/block/queue-sysfs.txt b/Documentation/block/queue-sysfs.txt > index d515d58962b9..2a3904030dea 100644 > --- a/Documentation/block/queue-sysfs.txt > +++ b/Documentation/block/queue-sysfs.txt > @@ -14,6 +14,12 @@ add_random (RW) > This file allows to turn off the disk entropy contribution. Default > value of this file is '1'(on). > > +dax (RO) > +-------- > +This file indicates whether the device supports Direct Access (DAX), > +used by CPU-addressable storage to bypass the pagecache. It shows '1' > +if true, '0' if not. > + > discard_granularity (RO) > ----------------------- > This shows the size of internal allocation of the device in bytes, if > @@ -46,6 +52,12 @@ hw_sector_size (RO) > ------------------- > This is the hardware sector size of the device, in bytes. > > +io_poll (RW) > +------------ > +When read, this file shows the total number of block IO polls and how > +many returned success. Writing '0' to this file will disable polling > +for this device. Writing any non-zero value will enable this feature. > + > iostats (RW) > ------------- > This file is used to control (on/off) the iostats accounting of the > @@ -151,5 +163,11 @@ device state. This means that it might not be safe to toggle the > setting from "write back" to "write through", since that will also > eliminate cache flushes issued by the kernel. > > +write_same_max_bytes (RO) > +------------------------- > +This is the number of bytes the device can write in a single write-same > +command. A value of '0' means write-same is not supported by this > +device. > + > > Jens Axboe <jens.axboe@xxxxxxxxxx>, February 2009 > -- > 1.8.3.1 > Thanks Joe! for the DAX part: Acked-by: Yigal Korman <yigal@xxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
