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device: Tag I/O for each mda on a device separately in log messages.

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Mark the first metadata area on each text format PV as MDA_PRIMARY.
Pass this information down to the device layer so that when
there are two metadata areas on a block device, we can easily
distinguish two independent streams of I/O.
This commit is contained in:
Alasdair G Kergon
2017-12-07 03:34:59 +00:00
parent 54154dc6f1
commit d591d04103
10 changed files with 77 additions and 55 deletions
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lib/device/dev-io.c
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@@ -61,6 +61,8 @@ static const char *_reasons[] = {
"PV labels",
"VG metadata header",
"VG metadata content",
"extra VG metadata header",
"extra VG metadata content",
"LVM1 metadata",
"pool metadata",
"LV content",