modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/Documentation/ABI/testing/sysfs-driver-xen-blkback
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@@ -25,3 +25,22 @@
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                 allocated without being in use. The time is in
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                 seconds, 0 means indefinitely long.
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                 The default is 60 seconds.
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+
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+What:           /sys/module/xen_blkback/parameters/buffer_squeeze_duration_ms
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+Date:           December 2019
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+KernelVersion:  5.6
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+Contact:        SeongJae Park <sjpark@amazon.de>
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+Description:
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+                When memory pressure is reported to blkback this option
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+                controls the duration in milliseconds that blkback will not
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+                cache any page not backed by a grant mapping.
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+                The default is 10ms.
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+
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+What:           /sys/module/xen_blkback/parameters/feature_persistent
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+Date:           September 2020
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+KernelVersion:  5.10
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+Contact:        SeongJae Park <sjpark@amazon.de>
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+Description:
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+                Whether to enable the persistent grants feature or not.  Note
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+                that this option only takes effect on newly connected backends.
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+                The default is Y (enable).