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-rw-r--r--doc/gensquashfs.15
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diff --git a/doc/gensquashfs.1 b/doc/gensquashfs.1
index f2150cf..c364c98 100644
--- a/doc/gensquashfs.1
+++ b/doc/gensquashfs.1
@@ -34,6 +34,11 @@ If gensquashfs was compiled with a built in pthread based parallel data
compressor, this option can be used to set the number of compressor
threads. If not set, the default is 1.
.TP
+\fB\-\-queue\-backlog\fR, \fB\-Q\fR <count>
+Maximum number of data blocks in the thread worker queue before the packer
+starts waiting for the block processors to catch up. Higher values result
+in higher memory consumption. Defaults to 10 times the number of workers.
+.TP
\fB\-\-block\-size\fR, \fB\-b\fR <size>
Block size to use for Squashfs image.
Defaults to 131072.