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| author | Paolo Bonzini <pbonzini@redhat.com> | 2013-02-08 14:06:13 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2013-02-22 21:29:43 +0100 |
| commit | ded9d2d5e247dc4d141c01bc8dc99d6ec832f9e8 (patch) | |
| tree | 06aefc8a40e77716dbc1df71f0c2be60b6ab406d /qemu-nbd.texi | |
| parent | a9384aff5315e7568b6ebc171f4a482e01f06526 (diff) | |
qemu-nbd: add --discard option
Similar to --cache and --aio, this option mimics the discard suboption
of "-drive".
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-nbd.texi')
| -rw-r--r-- | qemu-nbd.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/qemu-nbd.texi b/qemu-nbd.texi index 3e57200e76..5f3f3e3276 100644 --- a/qemu-nbd.texi +++ b/qemu-nbd.texi @@ -35,6 +35,10 @@ Export QEMU disk image using NBD protocol. @item --aio=@var{aio} choose asynchronous I/O mode between @samp{threads} (the default) and @samp{native} (Linux only). +@item --discard=@var{discard} + toggles whether @dfn{discard} (also known as @dfn{trim} or @dfn{unmap}) + requests are ignored or passed to the filesystem. The default is no + (@samp{--discard=ignore}). @item -c, --connect=@var{dev} connect @var{filename} to NBD device @var{dev} @item -d, --disconnect |