Hi, A friend of mine uses an old P4 based laptop for email and web browsing. Thanks to zram, I was able to reduce swapping to disk - however with just 512mb ram there is not a lot space for the page cache so the disk is frequently active re-reading data which would stay in pagecache otherwise. Would it make sence to use an old usb pen drive - or even two of them - as read-cache in writearound mode? Those pen drives usually suffer from very low random write throughput, but usually offer arround ~1000IOps for 4k random reads and ~20mb/s sequentially. Even if they would die within a few months, I have dozens of them and data integrity shouldn't be compromized with writearound mode. Does bcache wait for the caching device (stall the read-in-progres) when filling the cache by writing to the caching device? In case the caching device isn't respondig in time (writes to cheap pen block the device for ~500ms), is bcache able to read from the hdd instead? Thank you in advance, Clemens -- 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
