* [PATCH] migration: Don't return for postcopy_send_discard_bm_ram()
@ 2021-12-30 16:05 Philippe Mathieu-Daudé
2022-01-04 8:39 ` David Edmondson
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Philippe Mathieu-Daudé @ 2021-12-30 16:05 UTC (permalink / raw)
To: qemu-devel
Cc: David Edmondson, Philippe Mathieu-Daudé,
Dr. David Alan Gilbert, Peter Xu, Juan Quintela
postcopy_send_discard_bm_ram() always return zero. Since it can't
fail, simplify and do not return anything.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
Based-on: <20211224065000.97572-1-peterx@redhat.com>
---
migration/ram.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index 5234d1ece11..e241ce98461 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2433,14 +2433,12 @@ void ram_postcopy_migrated_memory_release(MigrationState *ms)
/**
* postcopy_send_discard_bm_ram: discard a RAMBlock
*
- * Returns zero on success
- *
* Callback from postcopy_each_ram_send_discard for each RAMBlock
*
* @ms: current migration state
* @block: RAMBlock to discard
*/
-static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
+static void postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
{
unsigned long end = block->used_length >> TARGET_PAGE_BITS;
unsigned long current;
@@ -2464,8 +2462,6 @@ static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
postcopy_discard_send_range(ms, one, discard_length);
current = one + discard_length;
}
-
- return 0;
}
static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block);
--
2.33.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH] migration: Don't return for postcopy_send_discard_bm_ram()
2021-12-30 16:05 [PATCH] migration: Don't return for postcopy_send_discard_bm_ram() Philippe Mathieu-Daudé
@ 2022-01-04 8:39 ` David Edmondson
2022-01-04 9:15 ` Juan Quintela
2022-01-26 21:20 ` Juan Quintela
2 siblings, 0 replies; 5+ messages in thread
From: David Edmondson @ 2022-01-04 8:39 UTC (permalink / raw)
To: Philippe Mathieu-Daudé
Cc: Peter Xu, qemu-devel, Dr. David Alan Gilbert, Juan Quintela
On Thursday, 2021-12-30 at 17:05:25 +01, Philippe Mathieu-Daudé wrote:
> postcopy_send_discard_bm_ram() always return zero. Since it can't
> fail, simplify and do not return anything.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
> ---
> Based-on: <20211224065000.97572-1-peterx@redhat.com>
> ---
> migration/ram.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/migration/ram.c b/migration/ram.c
> index 5234d1ece11..e241ce98461 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -2433,14 +2433,12 @@ void ram_postcopy_migrated_memory_release(MigrationState *ms)
> /**
> * postcopy_send_discard_bm_ram: discard a RAMBlock
> *
> - * Returns zero on success
> - *
> * Callback from postcopy_each_ram_send_discard for each RAMBlock
> *
> * @ms: current migration state
> * @block: RAMBlock to discard
> */
> -static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> +static void postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> {
> unsigned long end = block->used_length >> TARGET_PAGE_BITS;
> unsigned long current;
> @@ -2464,8 +2462,6 @@ static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> postcopy_discard_send_range(ms, one, discard_length);
> current = one + discard_length;
> }
> -
> - return 0;
> }
>
> static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block);
dme.
--
Tell me sweet little lies.
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] migration: Don't return for postcopy_send_discard_bm_ram()
2021-12-30 16:05 [PATCH] migration: Don't return for postcopy_send_discard_bm_ram() Philippe Mathieu-Daudé
2022-01-04 8:39 ` David Edmondson
@ 2022-01-04 9:15 ` Juan Quintela
2022-01-04 9:23 ` Peter Xu
2022-01-26 21:20 ` Juan Quintela
2 siblings, 1 reply; 5+ messages in thread
From: Juan Quintela @ 2022-01-04 9:15 UTC (permalink / raw)
To: Philippe Mathieu-Daudé
Cc: David Edmondson, qemu-devel, Peter Xu, Dr. David Alan Gilbert
Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
> postcopy_send_discard_bm_ram() always return zero. Since it can't
> fail, simplify and do not return anything.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
> Based-on: <20211224065000.97572-1-peterx@redhat.com>
> ---
> migration/ram.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/migration/ram.c b/migration/ram.c
> index 5234d1ece11..e241ce98461 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -2433,14 +2433,12 @@ void ram_postcopy_migrated_memory_release(MigrationState *ms)
> /**
> * postcopy_send_discard_bm_ram: discard a RAMBlock
> *
> - * Returns zero on success
> - *
> * Callback from postcopy_each_ram_send_discard for each RAMBlock
> *
> * @ms: current migration state
> * @block: RAMBlock to discard
> */
> -static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> +static void postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> {
> unsigned long end = block->used_length >> TARGET_PAGE_BITS;
> unsigned long current;
> @@ -2464,8 +2462,6 @@ static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> postcopy_discard_send_range(ms, one, discard_length);
> current = one + discard_length;
> }
> -
> - return 0;
> }
>
> static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block);
Nack.
You need to change the only caller (postcopy_each_send_discard) also.
ret = postcopy_send_discard_bm_ram(ms, block);
postcopy_discard_send_finish(ms);
if (ret) {
return ret;
}
Not sure if doing the same operation with
postcopy_each_send_discard/ram_postcopy_send_discard_bitmap() and
postcopy_chunk_hugepages makes sense.
Later, Juan.
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] migration: Don't return for postcopy_send_discard_bm_ram()
2022-01-04 9:15 ` Juan Quintela
@ 2022-01-04 9:23 ` Peter Xu
0 siblings, 0 replies; 5+ messages in thread
From: Peter Xu @ 2022-01-04 9:23 UTC (permalink / raw)
To: Juan Quintela
Cc: David Edmondson, Philippe Mathieu-Daudé,
qemu-devel, Dr. David Alan Gilbert
On Tue, Jan 04, 2022 at 10:15:16AM +0100, Juan Quintela wrote:
> Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
> > postcopy_send_discard_bm_ram() always return zero. Since it can't
> > fail, simplify and do not return anything.
> >
> > Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> > ---
> > Based-on: <20211224065000.97572-1-peterx@redhat.com>
> > ---
> > migration/ram.c | 6 +-----
> > 1 file changed, 1 insertion(+), 5 deletions(-)
> >
> > diff --git a/migration/ram.c b/migration/ram.c
> > index 5234d1ece11..e241ce98461 100644
> > --- a/migration/ram.c
> > +++ b/migration/ram.c
> > @@ -2433,14 +2433,12 @@ void ram_postcopy_migrated_memory_release(MigrationState *ms)
> > /**
> > * postcopy_send_discard_bm_ram: discard a RAMBlock
> > *
> > - * Returns zero on success
> > - *
> > * Callback from postcopy_each_ram_send_discard for each RAMBlock
> > *
> > * @ms: current migration state
> > * @block: RAMBlock to discard
> > */
> > -static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> > +static void postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> > {
> > unsigned long end = block->used_length >> TARGET_PAGE_BITS;
> > unsigned long current;
> > @@ -2464,8 +2462,6 @@ static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
> > postcopy_discard_send_range(ms, one, discard_length);
> > current = one + discard_length;
> > }
> > -
> > - return 0;
> > }
> >
> > static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block);
>
> Nack.
>
> You need to change the only caller (postcopy_each_send_discard) also.
>
> ret = postcopy_send_discard_bm_ram(ms, block);
> postcopy_discard_send_finish(ms);
> if (ret) {
> return ret;
> }
>
> Not sure if doing the same operation with
> postcopy_each_send_discard/ram_postcopy_send_discard_bitmap() and
> postcopy_chunk_hugepages makes sense.
Juan,
Phil's patch has a based-on dependency with the other patch:
https://lore.kernel.org/qemu-devel/20211224065000.97572-6-peterx@redhat.com/
Thanks,
--
Peter Xu
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] migration: Don't return for postcopy_send_discard_bm_ram()
2021-12-30 16:05 [PATCH] migration: Don't return for postcopy_send_discard_bm_ram() Philippe Mathieu-Daudé
2022-01-04 8:39 ` David Edmondson
2022-01-04 9:15 ` Juan Quintela
@ 2022-01-26 21:20 ` Juan Quintela
2 siblings, 0 replies; 5+ messages in thread
From: Juan Quintela @ 2022-01-26 21:20 UTC (permalink / raw)
To: Philippe Mathieu-Daudé
Cc: David Edmondson, qemu-devel, Peter Xu, Dr. David Alan Gilbert
Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
> postcopy_send_discard_bm_ram() always return zero. Since it can't
> fail, simplify and do not return anything.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
> Based-on: <20211224065000.97572-1-peterx@redhat.com>
And here, I learn to read Based-on:
Reviewed-by: Juan Quintela <quintela@redhat.com>
queued.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-01-26 21:21 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-12-30 16:05 [PATCH] migration: Don't return for postcopy_send_discard_bm_ram() Philippe Mathieu-Daudé
2022-01-04 8:39 ` David Edmondson
2022-01-04 9:15 ` Juan Quintela
2022-01-04 9:23 ` Peter Xu
2022-01-26 21:20 ` Juan Quintela
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