diff mbox series

[v2,07/20] parallels: Add a note about used bitmap in parallels_check_duplicate()

Message ID 20231019125854.390385-8-alexander.ivanov@virtuozzo.com
State New
Headers show
Series parallels: Add full dirty bitmap support | expand

Commit Message

Alexander Ivanov Oct. 19, 2023, 12:58 p.m. UTC 
In parallels_check_duplicate() We use a bitmap for duplication detection.
This bitmap is not related to used_bmap field in BDRVParallelsState. Add
a comment about it to avoid confusion.

Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
---
 block/parallels.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/block/parallels.c b/block/parallels.c
index dad2bf67cf..dd8ec925f3 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -837,7 +837,10 @@  parallels_check_duplicate(BlockDriverState *bs, BdrvCheckResult *res,
     bool fixed = false;
 
     /*
-     * Create a bitmap of used clusters.
+     * Create a bitmap of used clusters. Please note that this bitmap is not
+     * related to used_bmap field in BDRVParallelsState and is created only for
+     * local usage.
+     *
      * If a bit is set, there is a BAT entry pointing to this cluster.
      * Loop through the BAT entries, check bits relevant to an entry offset.
      * If bit is set, this entry is duplicated. Otherwise set the bit.