GFS2: Request demote when a "try" flock fails

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This patch changes the flock code so that it uses the TRY_1CB flag
instead of the TRY flag on the first attempt. That forces any holding
nodes to issue a dlm callback, which requests a demote of the glock.
Then, if the "try" failed, it sleeps a small amount of time for the
demote to occur. Then it tries again, for an increasing amount of time.
Subsequent attempts to gain the "try" lock don't use "_1CB" so that
only one callback is issued.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

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Bob Peterson 2014-08-20 12:44:45 -04:00 • committed by Steven Whitehouse

parent b650738cd0

commit 2ddfbdd684

1 changed files with 12 additions and 3 deletions

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fs/gfs2/file.c

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