ext4 testing in the F10 release cycle

[Richard W.M. Jones]

On Wed, Sep 03, 2008 at 12:36:55PM -0500, Eric Sandeen wrote:
> Hm, I probably need to get the fallocate.h header file included if it's
> not so that sys_fallocate can be used directly, but it is also exposed
> via posix_fallocate in glibc - tested here on xfs just because xfs_bmap
> is a handy way to show that it actually works via glibc:

Uh, stupid me - I was looking for the wrong call.  Rawhide _does_ have
it.

> > (c) Does ext4 preallocate in the background?  A synchronous
> > preallocate call isn't much use to virt-manager.
> 
> It does not, but what is the concern?  It doesn't take much time:

> (on ext4 this time):
> 
> [root at inode test]# time test_posix_fallocate testfile 0 10737418240
> 
> real    0m0.009s
> user    0m0.000s
> sys     0m0.009s

OK ... I'm assuming though that the zeroes aren't all written to disk
in this time, so that is exactly what I wanted.

Rich.

-- 
Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
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