On 2018-04-18 18:57:23 -0700, Matthew Wilcox wrote: > On Thu, Apr 19, 2018 at 01:47:49AM +0000, Trond Myklebust wrote: > > If the main use case is something like Postgresql, where you care about > > just one or two critical files, rather than monitoring the entire > > filesystem could we perhaps use a dedicated mmap() mode? It should be > > possible to throw up a bitmap that displays the exact blocks or pages > > that are affected, once the file has been damaged. > > Perhaps we need to have a quick summary of the postgres problem ... > they're not concerned with "one or two files", otherwise they could > just keep those files open and the wb_err mechanism would work fine. > The problem is that they have too many files to keep open in their > checkpointer process, and when they come along and open the files, > they don't see the error.. Correct. Do you want a summary here or at LSF/MM? Thanks to Jon Corbet I've got a last minute invitation. Greetings, Andres Freund
