> This may be known already, but I noticed the following message in syslog > during boot: > > Btrfs detected SSD devices, enabling SSD mode > > Btrfs is right in a sense: there is a SSD involved, but there's a HDD as > well. I don't think it is an issue, but I have no idea how "btrfs' SSD > optimizations" will interact with bcache. Might be interesting. >From https://btrfs.wiki.kernel.org/ : > SSD […] optimizations (e.g. avoiding unnecessary seek optimizations, sending writes in clusters, even if they are from unrelated files. This results in larger write operations and faster write throughput) The optimisations should be beneficial iff bcache is used in writeback mode. ssd_spread and discard are enabled separately; I'm not sure what ssd_spread (from the wiki: more strict about finding a large unused region of the disk for new allocations) would do for bcache. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
