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[PATCH v2 9/9] memory: Delay the transaction pop() until commit complete
From: |
Peter Xu |
Subject: |
[PATCH v2 9/9] memory: Delay the transaction pop() until commit completed |
Date: |
Fri, 23 Jul 2021 15:34:44 -0400 |
This should be functionally the same as before, but this allows the
memory_region_transaction_depth to be non-zero during commit, which can help us
to do sanity check on misuses.
Since at it, fix an indentation issue on the bracket.
Signed-off-by: Peter Xu <peterx@redhat.com>
---
softmmu/memory.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 08327c22e2..cf7943c02c 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -1114,8 +1114,7 @@ void memory_region_transaction_commit(void)
assert(memory_region_transaction_depth);
assert(qemu_mutex_iothread_locked());
- memory_region_transaction_pop();
- if (!memory_region_transaction_depth) {
+ if (memory_region_transaction_depth == 1) {
if (memory_region_update_pending) {
flatviews_reset();
@@ -1134,7 +1133,14 @@ void memory_region_transaction_commit(void)
}
ioeventfd_update_pending = false;
}
- }
+ }
+
+ /*
+ * Pop the depth at last, so that memory_region_transaction_depth will
+ * still be non-zero during committing. This can help us to do some sanity
+ * check within the process of committing.
+ */
+ memory_region_transaction_pop();
}
static void memory_region_destructor_none(MemoryRegion *mr)
--
2.31.1
- [PATCH v2 3/9] memory: Introduce memory_region_transaction_{push|pop}(), (continued)
- [PATCH v2 5/9] cpus: Use qemu_cond_wait_iothread() where proper, Peter Xu, 2021/07/23
- [PATCH v2 8/9] memory: Assert on no ongoing memory transaction before release BQL, Peter Xu, 2021/07/23
- [PATCH v2 9/9] memory: Delay the transaction pop() until commit completed,
Peter Xu <=
- [PATCH v2 6/9] cpus: Remove the mutex parameter from do_run_on_cpu(), Peter Xu, 2021/07/23
- [PATCH v2 7/9] cpus: Introduce qemu_mutex_unlock_iothread_prepare(), Peter Xu, 2021/07/23
Re: [PATCH v2 0/9] memory: Sanity checks memory transaction when releasing BQL, Peter Xu, 2021/07/23
Re: [PATCH v2 0/9] memory: Sanity checks memory transaction when releasing BQL, David Hildenbrand, 2021/07/27