[PATCH v2 05/16] block: Documentation: add sysfs ABI for expedite_dmpg and expedite_swapin
From: Venkatraman S <hidden>
Date: 2012-05-03 14:23:04
Also in:
linux-fsdevel, linux-mmc, linux-omap, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Add description on the usage of expedite_dmpg and expedite_swapin. Signed-off-by: Venkatraman S <redacted> --- Documentation/ABI/testing/sysfs-block | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index c1eb41c..0fb9fef 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block@@ -206,3 +206,15 @@ Description: when a discarded area is read the discard_zeroes_data parameter will be set to one. Otherwise it will be 0 and the result of reading a discarded area is undefined. + +What: /sys/block/<disk>/queue/expedite_demandpaging +What: /sys/block/<disk>/queue/expedite_swapin +Date: April 2012 +Contact: Venkatraman S <svenkatr@ti.com> +Description: + For latency improvements, some storage devices could + provide a mechanism for servicing demand paging and + swapin requests in a high priority manner. Setting + these flags to 1 would get the requests marked with + REQ_RW_DMPG or REQ_RW_SWAPIN to be moved to the front + of elevator queue.
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1.7.10.rc2
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