[libvirt] [PATCH] qemu: improve efficiency of dd during snapshots

[Eric Blake]

On 12/30/2010 01:48 AM, Paweł Krześniak wrote:
> On Wed, Dec 22, 2010 at 22:06, Eric Blake <eblake at redhat.com> wrote:
>> diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
>> index 7877731..284f9c4 100644
>> --- a/src/qemu/qemu_monitor_json.c
>> +++ b/src/qemu/qemu_monitor_json.c
>> @@ -1695,10 +1695,11 @@ int qemuMonitorJSONMigrateToFile(qemuMonitorPtr mon,
>>      * <> redirection to avoid truncating a regular file.  */
>>     if (virAsprintf(&dest, "exec:" VIR_WRAPPER_SHELL_PREFIX "%s | "
>>                     "{ dd bs=%llu seek=%llu if=/dev/null && "
>> -                    "dd bs=%llu; } 1<>%s" VIR_WRAPPER_SHELL_SUFFIX,
>> +                    "dd ibs=%llu; obs=%llu } 1<>%s" VIR_WRAPPER_SHELL_SUFFIX,
> 
> typo: semicolon before obs. Should be:
>                     "dd ibs=%llu obs=%llu } 1<>%s" VIR_WRAPPER_SHELL_SUFFIX,

Thanks for the review.  But your correction is also wrong.  It should be:

"dd ibs=%llu obs=%llu; } 1<>%s"

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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