Andreas Dilger <adilger@clusterfs.com> writes: > On Feb 03, 2003 12:08 +0100, Matthias Andree wrote: >> Are you aware of a module that applies to recent kernel versions and >> that traces block numbers of ll_rw_block()? It might turn up some useful >> information -- then we'd easier know the ext3 "output" to the hard disk; >> we already know the "input" from the application at the syscall level. > > Stephen Tweedie has a loopback driver: > > http://people.redhat.com/sct/patches/testdrive/ > > which allows you to trace all I/O. lo and behold. How do I use that one? Load the module and then do a "regular" loopback mount? What's the physical unit of "frequency" for fault injection if I am to use this to test applications for robustness against EIO? -- Matthias Andree _______________________________________________ Ext3-users@redhat.com https://listman.redhat.com/mailman/listinfo/ext3-users
