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[Qemu-devel] [PATCH v5 1/6] Postcopy: Avoid 0 length discards
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[Qemu-devel] [PATCH v5 1/6] Postcopy: Avoid 0 length discards |
Date: |
Fri, 10 Jun 2016 11:49:31 +0100 |
From: "Dr. David Alan Gilbert" <address@hidden>
The discard code in migration/ram.c would send request for
zero length discards in the case where no discards were needed.
It doesn't appear to have had any bad effect.
Signed-off-by: Dr. David Alan Gilbert <address@hidden>
Reviewed-by: Denis V. Lunev <address@hidden>
---
migration/ram.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/migration/ram.c b/migration/ram.c
index 844ea46..5f929d6 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1557,7 +1557,9 @@ static int postcopy_send_discard_bm_ram(MigrationState
*ms,
} else {
discard_length = zero - one;
}
- postcopy_discard_send_range(ms, pds, one, discard_length);
+ if (discard_length) {
+ postcopy_discard_send_range(ms, pds, one, discard_length);
+ }
current = one + discard_length;
} else {
current = one;
--
2.7.4
- [Qemu-devel] [PATCH v5 0/6] postcopy (& 1 test) patch for 2.7, Dr. David Alan Gilbert (git), 2016/06/10
- [Qemu-devel] [PATCH v5 1/6] Postcopy: Avoid 0 length discards,
Dr. David Alan Gilbert (git) <=
- [Qemu-devel] [PATCH v5 3/6] Postcopy: Add stats on page requests, Dr. David Alan Gilbert (git), 2016/06/10
- [Qemu-devel] [PATCH v5 5/6] tests: fix libqtest socket timeouts, Dr. David Alan Gilbert (git), 2016/06/10
- [Qemu-devel] [PATCH v5 6/6] Postcopy: Check for support when setting the capability, Dr. David Alan Gilbert (git), 2016/06/10
- [Qemu-devel] [PATCH v5 2/6] Migration: Split out ram part of qmp_query_migrate, Dr. David Alan Gilbert (git), 2016/06/10
- [Qemu-devel] [PATCH v5 4/6] test: Postcopy, Dr. David Alan Gilbert (git), 2016/06/10