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Differential D25066

Add O_DIRECT flag to DD for cache bypass
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Authored by rscheff on May 30 2020, 12:01 PM.
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rgrimes
tuexen
mmacy
kevans
eadler
cc
bcr
Group Reviewers
manpages
Commits
rS362830: MFC r361806: Add O_DIRECT flag to DD for cache bypass
rS361806: Add O_DIRECT flag to DD for cache bypass
Summary

FreeBSD DD utility has not had support for the O_DIRECT flag, which
is useful to bypass local caching, e.g. for unconditionally issuing
NFS IO requests during testing.

Test Plan

Mount an NFS export. Perform dd reads twice in a row and validate
that traffic is observed on the network in the 2nd iteration also.

Diff Detail

Repository
rS FreeBSD src repository - subversion
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Tests Not Applicable

Revision Contents
Changeset List

PathSize
head/
bin/
dd/
2 lines
2 lines
8 lines
9 lines

Diff 72686

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head/bin/dd/args.c

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head/bin/dd/dd.h

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head/bin/dd/dd.1

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head/bin/dd/dd.c

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