Re: UNS: Re: Data corruption problem

[Wayne Walker <wwalker-7+hyfkrzchDWTcdHvfGLfFaTQe2KTcn/@public.gmane.org>]

On Fri, Feb 11, 2011 at 09:41:17AM -0500, Jeff Layton wrote:
> > No, Jeff.  Nothing in the logs and from the user space side there are
> > no errors.  All debug levels are at the system defaults.  After 12
> > attempts last night I've still not reproduced.  I will work with my QA
> > guy this morning (CST here) to see if we can reproduce.  What can I do
> > to gather the best data for you guys?
> > 
> 
> To be clear...are you sure that the close(2) or fsync(2) syscalls did
> not return an error? It's a common bug for programs to ignore the return
> code from close(2), and that's where errors during writeback get
> reported.

Gotcha, I will grab a java dev and code review the test app.  My java-fu
is weak, but I think java will throw an exception on either failure,
just have to make sure some dev didn't put in a wide open catch.

> The reason I ask is that there were some issues that were fixed
> recently in mainline with cifs writeback. The CIFS code treated
> timeouts during writeback as hard errors instead of retrying them, but
> in those cases the client should have returned an error during fsync or
> close.

Good to know.  Thank you.

-- 

Wayne Walker
wwalker-7+hyfkrzchDWTcdHvfGLfFaTQe2KTcn/@public.gmane.org
(512) 633-8076
Senior Consultant
Solid Constructs, LLC

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