diff options
Diffstat (limited to 'include/exec/memory.h')
| -rw-r--r-- | include/exec/memory.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index e5e865d1a9..9458e2801d 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -1104,7 +1104,14 @@ struct AddressSpace { QTAILQ_HEAD(, MemoryListener) listeners; QTAILQ_ENTRY(AddressSpace) address_spaces_link; - /* Maximum DMA bounce buffer size used for indirect memory map requests */ + /* + * Maximum DMA bounce buffer size used for indirect memory map requests. + * This limits the total size of bounce buffer allocations made for + * DMA requests to indirect memory regions within this AddressSpace. DMA + * requests that exceed the limit (e.g. due to overly large requested size + * or concurrent DMA requests having claimed too much buffer space) will be + * rejected and left to the caller to handle. + */ size_t max_bounce_buffer_size; /* Total size of bounce buffers currently allocated, atomically accessed */ size_t bounce_buffer_size; |