From: Peter Xu <peterx@redhat.com>
To: qemu-devel@nongnu.org
Cc: David Edmondson <david.edmondson@oracle.com>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
Leonardo Bras Soares Passos <lsoaresp@redhat.com>,
peterx@redhat.com, Juan Quintela <quintela@redhat.com>
Subject: [PATCH v3 5/8] migration: Drop return code for disgard ram process
Date: Fri, 24 Dec 2021 14:49:57 +0800 [thread overview]
Message-ID: <20211224065000.97572-6-peterx@redhat.com> (raw)
In-Reply-To: <20211224065000.97572-1-peterx@redhat.com>
It will just never fail. Drop those return values where they're constantly
zeros.
A tiny touch-up on the tracepoint so trace_ram_postcopy_send_discard_bitmap()
is called after the logic itself (which sounds more reasonable).
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
migration/migration.c | 5 +----
migration/ram.c | 20 +++++---------------
migration/ram.h | 2 +-
3 files changed, 7 insertions(+), 20 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index 0652165610..252ce1eaec 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2991,10 +2991,7 @@ static int postcopy_start(MigrationState *ms)
* that are dirty
*/
if (migrate_postcopy_ram()) {
- if (ram_postcopy_send_discard_bitmap(ms)) {
- error_report("postcopy send discard bitmap failed");
- goto fail;
- }
+ ram_postcopy_send_discard_bitmap(ms);
}
/*
diff --git a/migration/ram.c b/migration/ram.c
index e7107b9790..5234d1ece1 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2473,8 +2473,6 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block);
/**
* postcopy_each_ram_send_discard: discard all RAMBlocks
*
- * Returns 0 for success or negative for error
- *
* Utility for the outgoing postcopy code.
* Calls postcopy_send_discard_bm_ram for each RAMBlock
* passing it bitmap indexes and name.
@@ -2483,10 +2481,9 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block);
*
* @ms: current migration state
*/
-static int postcopy_each_ram_send_discard(MigrationState *ms)
+static void postcopy_each_ram_send_discard(MigrationState *ms)
{
struct RAMBlock *block;
- int ret;
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
postcopy_discard_send_init(ms, block->idstr);
@@ -2504,14 +2501,9 @@ static int postcopy_each_ram_send_discard(MigrationState *ms)
* just needs indexes at this point, avoids it having
* target page specific code.
*/
- ret = postcopy_send_discard_bm_ram(ms, block);
+ postcopy_send_discard_bm_ram(ms, block);
postcopy_discard_send_finish(ms);
- if (ret) {
- return ret;
- }
}
-
- return 0;
}
/**
@@ -2584,8 +2576,6 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block)
/**
* ram_postcopy_send_discard_bitmap: transmit the discard bitmap
*
- * Returns zero on success
- *
* Transmit the set of pages to be discarded after precopy to the target
* these are pages that:
* a) Have been previously transmitted but are now dirty again
@@ -2596,7 +2586,7 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block)
*
* @ms: current migration state
*/
-int ram_postcopy_send_discard_bitmap(MigrationState *ms)
+void ram_postcopy_send_discard_bitmap(MigrationState *ms)
{
RAMState *rs = ram_state;
@@ -2610,9 +2600,9 @@ int ram_postcopy_send_discard_bitmap(MigrationState *ms)
rs->last_sent_block = NULL;
rs->last_page = 0;
- trace_ram_postcopy_send_discard_bitmap();
+ postcopy_each_ram_send_discard(ms);
- return postcopy_each_ram_send_discard(ms);
+ trace_ram_postcopy_send_discard_bitmap();
}
/**
diff --git a/migration/ram.h b/migration/ram.h
index f543e25765..2c6dc3675d 100644
--- a/migration/ram.h
+++ b/migration/ram.h
@@ -57,7 +57,7 @@ int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
void acct_update_position(QEMUFile *f, size_t size, bool zero);
void ram_postcopy_migrated_memory_release(MigrationState *ms);
/* For outgoing discard bitmap */
-int ram_postcopy_send_discard_bitmap(MigrationState *ms);
+void ram_postcopy_send_discard_bitmap(MigrationState *ms);
/* For incoming postcopy discard */
int ram_discard_range(const char *block_name, uint64_t start, size_t length);
int ram_postcopy_incoming_init(MigrationIncomingState *mis);
--
2.32.0
next prev parent reply other threads:[~2021-12-24 7:06 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-24 6:49 [PATCH v3 0/8] migration: Postcopy cleanup on ram disgard Peter Xu
2021-12-24 6:49 ` [PATCH v3 1/8] migration: Drop dead code of ram_debug_dump_bitmap() Peter Xu
2021-12-30 15:53 ` Philippe Mathieu-Daudé
2021-12-24 6:49 ` [PATCH v3 2/8] migration: Don't return for postcopy_chunk_hostpages() Peter Xu
2021-12-30 15:53 ` Philippe Mathieu-Daudé
2021-12-24 6:49 ` [PATCH v3 3/8] migration: Drop postcopy_chunk_hostpages() Peter Xu
2021-12-24 6:49 ` [PATCH v3 4/8] migration: Do chunk page in postcopy_each_ram_send_discard() Peter Xu
2021-12-24 6:49 ` Peter Xu [this message]
2021-12-30 16:03 ` [PATCH v3 5/8] migration: Drop return code for disgard ram process Philippe Mathieu-Daudé
2021-12-24 6:49 ` [PATCH v3 6/8] migration: Dump sub-cmd name in loadvm_process_command tp Peter Xu
2021-12-24 10:56 ` David Edmondson
2021-12-30 15:58 ` Philippe Mathieu-Daudé
2021-12-24 6:49 ` [PATCH v3 7/8] migration: Finer grained tracepoints for POSTCOPY_LISTEN Peter Xu
2021-12-24 10:56 ` David Edmondson
2021-12-30 15:56 ` Philippe Mathieu-Daudé
2021-12-24 6:50 ` [PATCH v3 8/8] migration: Tracepoint change in postcopy-run bottom half Peter Xu
2021-12-24 10:57 ` David Edmondson
2021-12-30 15:57 ` Philippe Mathieu-Daudé
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