| Message ID | 20201228090053.346-2-gaojinhao@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix memory leak of some device state in migration | expand |
On Mon, Dec 28, 2020 at 05:00:51PM +0800, g00517791 wrote: > From: Jinhao Gao <gaojinhao@huawei.com> > > When VM migrate VMState of spapr_pci, the field(msi_devs) of spapr_pci > having a flag of VMS_ALLOC need to allocate memory. If the src doesn't free > memory of msi_devs in SaveStateEntry of spapr_pci after QEMUFile save > VMState of spapr_pci, it may result in memory leak of msi_devs. We add the > post_save func to free memory, which prevents memory leak. > > Signed-off-by: Jinhao Gao <gaojinhao@huawei.com> > Acked-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> > --- > hw/ppc/spapr_pci.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c > index 76d7c91e9c..1b2b940606 100644 > --- a/hw/ppc/spapr_pci.c > +++ b/hw/ppc/spapr_pci.c > @@ -2173,6 +2173,16 @@ static int spapr_pci_pre_save(void *opaque) > return 0; > } > > +static int spapr_pci_post_save(void *opaque) > +{ > + SpaprPhbState *sphb = opaque; > + > + g_free(sphb->msi_devs); > + sphb->msi_devs = NULL; > + sphb->msi_devs_num = 0; > + return 0; > +} > + > static int spapr_pci_post_load(void *opaque, int version_id) > { > SpaprPhbState *sphb = opaque; > @@ -2205,6 +2215,7 @@ static const VMStateDescription vmstate_spapr_pci = { > .version_id = 2, > .minimum_version_id = 2, > .pre_save = spapr_pci_pre_save, > + .post_save = spapr_pci_post_save, > .post_load = spapr_pci_post_load, > .fields = (VMStateField[]) { > VMSTATE_UINT64_EQUAL(buid, SpaprPhbState, NULL), > -- > 2.23.0
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 76d7c91e9c..1b2b940606 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -2173,6 +2173,16 @@ static int spapr_pci_pre_save(void *opaque) return 0; } +static int spapr_pci_post_save(void *opaque) +{ + SpaprPhbState *sphb = opaque; + + g_free(sphb->msi_devs); + sphb->msi_devs = NULL; + sphb->msi_devs_num = 0; + return 0; +} + static int spapr_pci_post_load(void *opaque, int version_id) { SpaprPhbState *sphb = opaque; @@ -2205,6 +2215,7 @@ static const VMStateDescription vmstate_spapr_pci = { .version_id = 2, .minimum_version_id = 2, .pre_save = spapr_pci_pre_save, + .post_save = spapr_pci_post_save, .post_load = spapr_pci_post_load, .fields = (VMStateField[]) { VMSTATE_UINT64_EQUAL(buid, SpaprPhbState, NULL),