Re: [Qemu-devel] fstrim & upstream kernel not working

[Paolo Bonzini]

Il 14/03/2014 14:24, Richard W.M. Jones ha scritto:
> > > Could be a race condition (something going on in the background
> > > between rm and fstrim).
> Not much happens in the libguestfs appliance.  There are usually only
> two processes (udev + guestfsd).

There's also the kernel.  The ext4 driver is probably doing something 
after rm returns, and hasn't finished yet when you invoke FITRIM.

Paolo