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We're having unresolved issues with the glock holder auto-demotion mechanism
introduced in commit dc732906c245. This mechanism was assumed to be essential
for avoiding frequent short reads and writes until commit 296abc0d91d8
("gfs2: No short reads or writes upon glock contention"). Since then,
when the inode glock is lost, it is simply re-acquired and the operation
is resumed. This means that apart from the performance penalty, we
might as well drop the inode glock before faulting in pages, and
re-acquire it afterwards.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
e1fa9ea85c