common/qat: support dual threads for enqueue/dequeue

[dpdk.git] / doc / guides / compressdevs / qat_comp.rst

diff --git a/doc/guides/compressdevs/qat_comp.rst b/doc/guides/compressdevs/qat_comp.rst
index 6421f76..757611a 100644 (file)
--- a/doc/guides/compressdevs/qat_comp.rst
+++ b/doc/guides/compressdevs/qat_comp.rst
@@ -37,7 +37,10 @@ Limitations
 -----------
 
 * Compressdev level 0, no compression, is not supported.
-* Queue pairs are not thread-safe (that is, within a single queue pair, RX and TX from different lcores is not supported).
+* Queue-pairs are thread-safe on Intel CPUs but Queues are not (that is, within a single
+  queue-pair all enqueues to the TX queue must be done from one thread and all dequeues
+  from the RX queue must be done from one thread, but enqueues and dequeues may be done
+  in different threads.)
 * No BSD support as BSD QAT kernel driver not available.
 * When using Deflate dynamic huffman encoding for compression, the input size (op.src.length)
   must be < CONFIG_RTE_PMD_QAT_COMP_IM_BUFFER_SIZE from the config file,