AcoSail/kernel_optimize_test
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Don't try to make md arrays dirty if that is not meaningful.

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Arrays personalities such as 'raid0' and 'linear' have no redundancy,
and so marking them as 'clean' or 'dirty' is not meaningful.
So always allow write requests without requiring a superblock update.

Such arrays types are detected by ->sync_request being NULL.  If it is
not possible to send a sync request we don't need a 'dirty' flag because
all a dirty flag does is trigger some sync_requests.

Signed-off-by: Neil Brown <neilb@suse.de>
This commit is contained in:
Neil Brown 2008-06-28 08:31:27 +10:00
parent f48ed53838
commit 1a0fd49773
1 changed files with 2 additions and 0 deletions
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2
drivers/md/md.c
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@ -5536,6 +5536,8 @@ void md_allow_write(mddev_t *mddev)
return;
if (mddev->ro)
return;
if (!mddev->pers->sync_request)
return;
spin_lock_irq(&mddev->write_lock);
if (mddev->in_sync) {