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migration: ensure htab_save_first completes after timeout

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htab_save_first_pass could return without finishing its work due to
timeout. The patch checks if another invocation of it is necessary and
will call it in htab_save_complete if necessary.

Signed-off-by: Jianjun Duan <duanj@linux.vnet.ibm.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
[removed overlong line]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2016-02-11 10:40:44 +10:00
parent fa48b4328c
commit 378bc21756
1 changed files with 6 additions and 1 deletions
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7
hw/ppc/spapr.c
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@ -1312,6 +1312,7 @@ static int htab_save_setup(QEMUFile *f, void *opaque)
static void htab_save_first_pass(QEMUFile *f, sPAPRMachineState *spapr,
int64_t max_ns)
{
bool has_timeout = max_ns != -1;
int htabslots = HTAB_SIZE(spapr) / HASH_PTE_SIZE_64;
int index = spapr->htab_save_index;
int64_t starttime = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
@ -1345,7 +1346,8 @@ static void htab_save_first_pass(QEMUFile *f, sPAPRMachineState *spapr,
qemu_put_buffer(f, HPTE(spapr->htab, chunkstart),
HASH_PTE_SIZE_64 * n_valid);
if ((qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - starttime) > max_ns) {
if (has_timeout &&
(qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - starttime) > max_ns) {
break;
}
}
@ -1498,6 +1500,9 @@ static int htab_save_complete(QEMUFile *f, void *opaque)
}
close_htab_fd(spapr);
} else {
if (spapr->htab_first_pass) {
htab_save_first_pass(f, spapr, -1);
}
htab_save_later_pass(f, spapr, -1);
}