Messages in this thread | | | Date | Fri, 14 Mar 2014 15:15:11 +0100 | From | Jan Kara <> | Subject | Re: [PATCH 1/1] fs/mpage.c: forgotten WRITE_SYNC in case of data integrity write |
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On Fri 14-03-14 10:11:43, Tejun Heo wrote: > > Also, could you please help me do understand how can I guarantee > > integrity in case of block device with big volatile > > cache and filesystem, which does not support REQ_FLUSH/FUA? > > If a device has a volatile cache but doesn't support flush, it can't > guarantee integrity. There's no way for its user to determine or > force whether certain data is on non-volatile media. It's an > inherently broken device. I think his problem was that the device does support REQ_FLUSH/FUA but the filesystem on top of it doesn't issue it properly. That's a filesystem problem so fix the filesystem... :) Which one is it?
Honza -- Jan Kara <jack@suse.cz> SUSE Labs, CR
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