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Btrfs: unplug all devices in the unplug call back
For larger multi-device filesystems, there was logic to limit the number of devices unplugged to just the page that was sent to our sync_page function. But, the code wasn't always unplugging the right device. Since this was just an optimization, disable it for now. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -1214,7 +1214,7 @@ void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
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u64 offset;
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/* the generic O_DIRECT read code does this */
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if (!page) {
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if (1 || !page) {
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__unplug_io_fn(bdi, page);
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return;
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}
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