Re: [RFC PATCH 1/5] block, ioprio: include caching advice via ionice

2014-10-29 Thread Dan Williams
On Wed, Oct 29, 2014 at 12:02 PM, Jeff Moyer wrote: > "Jason B. Akers" writes: > >> From: Dan Williams >> >> Steal one unused bit from the priority class and two bits from the >> priority data, to implement a 3 bit cache-advice field. Similar to the >> page cache advice from fadvise() these hin

Re: [RFC PATCH 1/5] block, ioprio: include caching advice via ionice

2014-10-29 Thread Jeff Moyer
"Jason B. Akers" writes: > From: Dan Williams > > Steal one unused bit from the priority class and two bits from the > priority data, to implement a 3 bit cache-advice field. Similar to the > page cache advice from fadvise() these hints are meant to be consumed > by hybrid drives. Solid State

[RFC PATCH 1/5] block, ioprio: include caching advice via ionice

2014-10-29 Thread Jason B. Akers
From: Dan Williams Steal one unused bit from the priority class and two bits from the priority data, to implement a 3 bit cache-advice field. Similar to the page cache advice from fadvise() these hints are meant to be consumed by hybrid drives. Solid State Hyrbid-Drives, as defined by the SATA-