[CHECKER] XFS doesn't respect mount -o sync (XFS, 2.6.11)

[CHECKER] XFS doesn't respect mount -o sync (XFS, 2.6.11)

[Junfeng Yang]

Hi,

We are from the Stanford Checker team and are working on a file system
checker called FiSC.  We checked XFS and found that even when a XFS
partition is mounted -o sync, file system operations are still not sync'ed
correctly.

A simple test case would be something like this:
mkdir 0001
reboot -f -n
After reboot, directory 0001 is lost.
Let me know if you need any more information to reproduce the warning.

We are not sure if this is the expected behavior on XFS or not, so your
inputs on this are well appreciated.

-Junfeng

Re: [CHECKER] XFS doesn't respect mount -o sync (XFS, 2.6.11)

[Nathan Scott]

On Sat, Mar 12, 2005 at 02:14:50AM -0800, Junfeng Yang wrote:
> 
> Hi,
> 
> We are from the Stanford Checker team and are working on a file system
> checker called FiSC.  We checked XFS and found that even when a XFS
> partition is mounted -o sync, file system operations are still not sync'ed
> correctly.

Its -o wsync in XFS.  This is the IRIX way, anyway - from a bit of
man page reading.  We should be stitching that into -o sync a bit
better in XFS.  The combination of -o wsync,sync should get you the
equivalent behaviour at the moment though, I think.

> We are not sure if this is the expected behavior on XFS or not, so your
> inputs on this are well appreciated.

Try using -o wsync for your tests, I'll look into our interpretation
of -o sync in XFS in the meantime.

cheers.

-- 
Nathan