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[TESTDAY] xl restore gives an error too soon after xl save


  • To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: George Dunlap <George.Dunlap@xxxxxxxxxx>
  • Date: Tue, 9 Jun 2020 16:44:37 +0000
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  • Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Paul Durrant <paul@xxxxxxx>
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  • Thread-topic: [TESTDAY] xl restore gives an error too soon after xl save

Somewhat surprising that if you save with -D, you get mysterious error messages 
for the next so-many seconds:

root@immortal:/images# xl save -D c6-01 /images/tmp/c6-01.save
Saving to /images/tmp/c6-01.save new xl format (info 0x3/0x0/950)
xc: info: Saving domain 19505, type x86 PV
xc: Frames: 524288/524288  100%
xc: End of stream: 0/0    0%
root@immortal:/images# xl restore tmp/c6-01.save
Loading new save file tmp/c6-01.save (new xl fmt info 0x3/0x0/950)
 Savefile contains xl domain config in JSON format
Parsing config from <saved>
libxl: error: libxl_create.c:692:libxl__domain_make: Domain 19505:domain id 
recently used: No such file or directory
libxl: error: libxl_create.c:1233:initiate_domain_create: Domain 19505:cannot 
make domain: -3
libxl: error: libxl_domain.c:1182:libxl__destroy_domid: Domain 
19505:Non-existant domain
libxl: error: libxl_domain.c:1136:domain_destroy_callback: Domain 19505:Unable 
to destroy guest
libxl: error: libxl_domain.c:1063:domain_destroy_cb: Domain 19505:Destruction 
of domain failed
root@immortal:/images# xl restore tmp/c6-01.save
Loading new save file tmp/c6-01.save (new xl fmt info 0x3/0x0/950)
 Savefile contains xl domain config in JSON format
Parsing config from <saved>
libxl: error: libxl_create.c:692:libxl__domain_make: Domain 19505:domain id 
recently used: No such file or directory
libxl: error: libxl_create.c:1233:initiate_domain_create: Domain 19505:cannot 
make domain: -3
libxl: error: libxl_domain.c:1182:libxl__destroy_domid: Domain 
19505:Non-existant domain
libxl: error: libxl_domain.c:1136:domain_destroy_callback: Domain 19505:Unable 
to destroy guest
libxl: error: libxl_domain.c:1063:domain_destroy_cb: Domain 19505:Destruction 
of domain failed

[A few minutes pass]

root@immortal:/images# xl restore tmp/c6-01.save
Loading new save file tmp/c6-01.save (new xl fmt info 0x3/0x0/950)
 Savefile contains xl domain config in JSON format
Parsing config from <saved>
xc: info: Found x86 PV domain from Xen 4.14
xc: info: Restoring domain
xc: info: Restore successful
xc: info: XenStore: mfn 0xbe8d2, dom 0, evt 1
xc: info: Console: mfn 0xbe8d1, dom 0, evt 2


 


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