On Thu, 28 Apr 2016, ching lu wrote: > is there any sysfs attribute storing the list of all attached cache > devices? i would like to write a script to force flushing cache by > stopping them all I don't think so, but you could scan sysfs easy enough. -- Eric Wheeler > > "echo 1 > /sys/fs/bcache/<cset-uuid>/stop" > > Furthermore, do the statement return only after the cache device is stopped > or i need to poll until "/sys/fs/bcache/<cset-uuid>/bdev*/state"="clean" > > On Wed, Apr 27, 2016 at 10:10 AM, Eric Wheeler > <bcache@xxxxxxxxxxxxxxxxxx> wrote: > > > > On Wed, 27 Apr 2016, ching lu wrote: > > > >> is there any command for forcing flushing cache or invalidate cache? > > > > I think you would benefit from reading this: > > > > https://www.kernel.org/doc/Documentation/bcache.txt > > > > > > -- > > Eric Wheeler > > > > > > > >> > >> On Wed, Apr 27, 2016 at 3:57 AM, Eric Wheeler <bcache@xxxxxxxxxxxxxxxxxx> wrote: > >> > On Tue, 26 Apr 2016, ching lu wrote: > >> > > >> >> Hi all, > >> >> > >> >> if i have 1 SSD caching 1 HDD using bcache, the cache mode is writeback > >> >> > >> >> if the PC shutdown/unmount normally, will all dirty data in the cache > >> >> be flushed to backing device before poweroff? > >> > > >> > No, it will remain in the cache. > >> > > >> >> i am afraid that SSD lose data if left without power for a long time. > >> >> e.g. hoilday. > >> > > >> > Wouldn't your data be retained if you used the SSD alone? SSDs should be > >> > stable in a powered off state unless it is a bad device. > >> > > >> > There exist RAM-based disks that may be volatile, but that is unlikely to > >> > be your situation. > >> > > >> > -- > >> > Eric Wheeler > >> > > >> >> > >> >> Thanks in advance, > >> >> C > >> >> -- > >> >> 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 > >> >> > >> > -- > 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 > -- 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
