[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v2] xen/console: buffer and show origin of guest PV writes
On 09/09/2013 06:46, "Daniel De Graaf" <dgdegra@xxxxxxxxxxxxx> wrote: > On 09/09/2013 07:13 AM, Keir Fraser wrote: >> On 16/08/2013 20:01, "Daniel De Graaf" <dgdegra@xxxxxxxxxxxxx> wrote: >> >>> Guests other than domain 0 using the console output have previously been >>> controlled by the VERBOSE define, but with no designation of which >>> guest's output was on the console. This patch converts the HVM output >>> buffering to be used by all domains, line buffering their output and >>> prefixing it with the domain ID. This is especially useful for debugging >>> stub domains. >>> >>> Signed-off-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx> >> >> This seems good, but, if we process and buffer dom0's output, we lose the >> possibility of running a terminal session in dom0 over the Xen console. >> Personally I do that quite a bit -- serial access only, get Xen's debugging >> there, but also can log in to dom0. Does noone else?? > > I do care about this use case (I also use it rather often), and it is > preserved > - this patch explicitly does not buffer or insert characters in dom0's output. > This means that we waste the 80-byte buffer for dom0, but I didn't think it > was > worth special-casing dom0 there too (also, doing that might break a PVH dom0 > that uses the HVM output - if that method is available, which I did not > check). That's great, but then the patch header is wrong as the output buffering is not used by *all* domains. Make it clear that dom0 is unaffected and then: Acked-by: Keir Fraser <keir@xxxxxxx> -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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