Re: [libvirt] [PATCH v5 07/36] qemu_process: Use qemuProcessQmp struct for a single process

In new process code, move from model where qemuProcessQmp struct can be used to activate a series of Qemu processes to model where one qemuProcessQmp struct is used for one and only one Qemu process. By allowing only one process activation per qemuProcessQmp struct, the struct can safely store process outputs like status and stderr, without being overwritten, until qemuProcessQmpFree is called. By doing this, process outputs like status and stderr can remain stored in the qemuProcessQmp struct without being overwritten by subsequent process activations. The forceTCG parameter (use / don't use KVM) will be passed when the qemuProcessQmp struct is initialized since the qemuProcessQmp struct won't be reused. Signed-off-by: Chris Venteicher <cventeic(a)redhat.com&gt; --- src/qemu/qemu_capabilities.c | 20 ++++++++++++++++---- src/qemu/qemu_process.c | 10 ++++++---- src/qemu/qemu_process.h | 7 ++++--- 3 files changed, 26 insertions(+), 11 deletions(-) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index a79329a134..bed9ca26a1 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c

@@ -4259,14 +4260,23 @@ virQEMUCapsInitQMP(virQEMUCapsPtr qemuCaps, goto cleanup; if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM)) { +

+ /* The second QEMU process probes for TCG capabilities + * in case the first process reported KVM as enabled + * (otherwise the first one already reported TCG capabilities). */ + qemuProcessQmpStop(proc);

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index fa050a1a27..324151a7c3 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c

@@ -8137,9 +8138,11 @@ qemuProcessQmpNew(const char *binary, if (VIR_STRDUP(proc->binary, binary) < 0) goto error; +

proc->runUid = runUid; proc->runGid = runGid; proc->qmperr = qmperr; + proc->forceTCG = forceTCG; /* the ".sock" sufix is important to avoid a possible clash with a qemu * domain called "capabilities"