On Tue, Aug 6, 2013 at 12:39 PM, Prashant Shah <pshah.mumbai@xxxxxxxxx> wrote: > Hi, > > I am trying to write a bio to a disk block directly using > submit_bio(), it works without any errors but on read it shows the old > data until I reboot the machine. Is there any way I can flush the > particular bio/dirty page immediately or force it to flush before the > next read ? > How are you reading and writing? What is your test utility? 'dd' has an option to specify iflag/oflag=direct, which would bypass buffer cache. But anyways this problem should not happen even if data is written to cache, you should read it back from cache. > code : > https://github.com/prashants/km/blob/master/writeblock/writeblock.c > > Regards. > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies Rajat _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
