On Fri, 3 Aug 2018 11:51:43 +0900 Minchan Kim <minchan@xxxxxxxxxx> wrote: > > Is it legitimate to be altering the bdi capabilities at this level? Or > > is this hacky? > > Most of device's bdi capability seems to be static but there are few drivers > which can change capability. For example, BDI_CAP_STABLE_WRITES > > drivers/scsi/iscsi_tcp.c > drivers/md/raid5.c > > I believe it's driver itself advertisement stuff so I hope it's not hack. The bdi is per-disk (per-queue). So if zram changes the bdi for a particular partition then it is accidentally mucking with the other partitions as well, and it shouldn't do that. At least, I think that's how it works - it's been a while. Jens, wake up ;)
