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[PATCH v2 11/25] migration: postcopy_pause_fault_thread() never fails
From: |
Peter Xu |
Subject: |
[PATCH v2 11/25] migration: postcopy_pause_fault_thread() never fails |
Date: |
Tue, 1 Mar 2022 16:39:11 +0800 |
Per the title, remove the return code and simplify the callers as the errors
will never be triggered. No functional change intended.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
migration/postcopy-ram.c | 25 ++++---------------------
1 file changed, 4 insertions(+), 21 deletions(-)
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index b0d12d5053..32c52f4b1d 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -891,15 +891,11 @@ static void mark_postcopy_blocktime_end(uintptr_t addr)
affected_cpu);
}
-static bool postcopy_pause_fault_thread(MigrationIncomingState *mis)
+static void postcopy_pause_fault_thread(MigrationIncomingState *mis)
{
trace_postcopy_pause_fault_thread();
-
qemu_sem_wait(&mis->postcopy_pause_sem_fault);
-
trace_postcopy_pause_fault_thread_continued();
-
- return true;
}
/*
@@ -959,13 +955,7 @@ static void *postcopy_ram_fault_thread(void *opaque)
* broken already using the event. We should hold until
* the channel is rebuilt.
*/
- if (postcopy_pause_fault_thread(mis)) {
- /* Continue to read the userfaultfd */
- } else {
- error_report("%s: paused but don't allow to continue",
- __func__);
- break;
- }
+ postcopy_pause_fault_thread(mis);
}
if (pfd[1].revents) {
@@ -1039,15 +1029,8 @@ retry:
msg.arg.pagefault.address);
if (ret) {
/* May be network failure, try to wait for recovery */
- if (postcopy_pause_fault_thread(mis)) {
- /* We got reconnected somehow, try to continue */
- goto retry;
- } else {
- /* This is a unavoidable fault */
- error_report("%s: postcopy_request_page() get %d",
- __func__, ret);
- break;
- }
+ postcopy_pause_fault_thread(mis);
+ goto retry;
}
}
--
2.32.0
- [PATCH v2 01/25] migration: Dump sub-cmd name in loadvm_process_command tp, (continued)
- [PATCH v2 01/25] migration: Dump sub-cmd name in loadvm_process_command tp, Peter Xu, 2022/03/01
- [PATCH v2 02/25] migration: Finer grained tracepoints for POSTCOPY_LISTEN, Peter Xu, 2022/03/01
- [PATCH v2 03/25] migration: Tracepoint change in postcopy-run bottom half, Peter Xu, 2022/03/01
- [PATCH v2 04/25] migration: Introduce postcopy channels on dest node, Peter Xu, 2022/03/01
- [PATCH v2 05/25] migration: Dump ramblock and offset too when non-same-page detected, Peter Xu, 2022/03/01
- [PATCH v2 06/25] migration: Add postcopy_thread_create(), Peter Xu, 2022/03/01
- [PATCH v2 07/25] migration: Move static var in ram_block_from_stream() into global, Peter Xu, 2022/03/01
- [PATCH v2 08/25] migration: Add pss.postcopy_requested status, Peter Xu, 2022/03/01
- [PATCH v2 09/25] migration: Move migrate_allow_multifd and helpers into migration.c, Peter Xu, 2022/03/01
- [PATCH v2 10/25] migration: Enlarge postcopy recovery to capture !-EIO too, Peter Xu, 2022/03/01
- [PATCH v2 11/25] migration: postcopy_pause_fault_thread() never fails,
Peter Xu <=
- [PATCH v2 14/25] migration: Add migration_incoming_transport_cleanup(), Peter Xu, 2022/03/01
- [PATCH v2 15/25] migration: Allow migrate-recover to run multiple times, Peter Xu, 2022/03/01
- [PATCH v2 13/25] migration: Move channel setup out of postcopy_try_recover(), Peter Xu, 2022/03/01
- [PATCH v2 16/25] migration: Add postcopy-preempt capability, Peter Xu, 2022/03/01
- [PATCH v2 17/25] migration: Postcopy preemption preparation on channel creation, Peter Xu, 2022/03/01
- [PATCH v2 18/25] migration: Postcopy preemption enablement, Peter Xu, 2022/03/01
- [PATCH v2 19/25] migration: Postcopy recover with preempt enabled, Peter Xu, 2022/03/01
- [PATCH v2 12/25] migration: Export ram_load_postcopy(), Peter Xu, 2022/03/01
- [PATCH v2 21/25] migration: Parameter x-postcopy-preempt-break-huge, Peter Xu, 2022/03/01
- [PATCH v2 22/25] migration: Add helpers to detect TLS capability, Peter Xu, 2022/03/01