[Bug 231400] Crashdumping to a geom mirror doesn't result in /var/crash being populated

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231400

            Bug ID: 231400
           Summary: Crashdumping to a geom mirror doesn't result in
                    /var/crash being populated
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: sbruno at FreeBSD.org

Using gmirrors as swap on our hosts in the cluster and I noticed that I can no
longer get a crashdump out of a system if its swap is gmirror based.

# gmirror status
        Name    Status  Components
mirror/swap0  COMPLETE  da0p2 (ACTIVE)
                        da1p2 (ACTIVE)
mirror/swap1  COMPLETE  da2p2 (ACTIVE)
                        da3p2 (ACTIVE)
mirror/swap2  COMPLETE  da5p2 (ACTIVE)
                        da6p2 (ACTIVE)

# gmirror list
Geom name: swap0
State: COMPLETE
Components: 2
Balance: load
Slice: 4096
Flags: NONE
GenID: 0
SyncID: 1
ID: 2592075302
Type: AUTOMATIC
Providers:
1. Name: mirror/swap0
   Mediasize: 8589934080 (8.0G)
   Sectorsize: 512
   Mode: r1w1e0
Consumers:
1. Name: da0p2
   Mediasize: 8589934592 (8.0G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 131072
   Mode: r1w1e1
   Sta
   GenID: 0
   SyncID: 1
   ID: 1783011607
2. Name: da1p2
   Mediasize: 8589934592 (8.0G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 131072
   Mode: r1w1e1
   State: ACTIVE
   Priority: 1
   Flags: NONE
   GenID: 0
   SyncID: 1
   ID: 74779342

Geom name: swap1
State: COMPLETE
Components: 2
Balance: load
Slice: 4096
Flags: NONE
GenID: 0
SyncID: 1
ID: 787141291
Type: AUTOMATIC
Providers:
1. Name: mirror/swap1
   Mediasize: 8589934080 (8.0G)
   Sectorsize: 512
   Mode: r1w1e0
Consumers:
1. Name: da2p2
   Mediasize: 8589934592 (8.0G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 131072
   Mode: r1w1e1
   State: ACTIVE
   Priority: 0
   Flags: NONE
   GenID: 0
   SyncID: 1
   ID: 3145384570
2. Name: da3p2
   Mediasize: 8589934592 (8.0G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 131072
   Mode: r1w1e1
   State: ACTIVE
   Priority: 1
   Flags: NONE
   GenID: 0
   SyncID: 1
   ID: 3680403470

Geom name: swap2
State: COMPLETE
Components: 2
Balance: load
Slice: 4096
Flags: NONE
GenID: 0
SyncID: 1
ID: 3352633282
Type: AUTOMATIC
Providers:
1. Name: mirror/swap2
   Mediasize: 8589934080 (8.0G)
   Sectorsize: 512
   Mode: r1w1e0
Consumers:
1. Name: da5p2
   Mediasize: 8589934592 (8.0G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 131072
   Mode: r1w1e1
   State: ACTIVE
   Priority: 1
   Flags: NONE
   GenID: 0
   SyncID: 1
   ID: 3811710265
2. Name: da6p2
   Mediasize: 8589934592 (8.0G)
   Sectorsize: 512
   Stripesize: 0
   Stripeoffset: 131072
   Mode: r1w1e1
   State: ACTIVE
   Priority: 0
   Flags: NONE
   GenID: 0
   SyncID: 1
   ID: 982746877

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