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[Xen-devel] [PATCH v3 5/6] libxl: print message how to recover from xl cpupool-cpu-remove errors



An error occurring when calling "xl cpupool-cpu-remove" might leave
the system in a state where a cpu is neither completely free nor in
a cpupool. This can easily be repaired by adding the cpu via
"xl cpupool-cpu-add" to the cpupool where it was removed from before.
Print a message telling this the user in case of an error.

Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 tools/libxl/xl_cmdimpl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 990d3c9..411473d 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -7716,8 +7716,10 @@ int main_cpupoolcpuremove(int argc, char **argv)
         goto out;
     }
 
-    if (libxl_cpupool_cpuremove_cpumap(ctx, poolid, &cpumap))
-        fprintf(stderr, "some cpus may not have been removed from %s\n", pool);
+    if (libxl_cpupool_cpuremove_cpumap(ctx, poolid, &cpumap)) {
+        fprintf(stderr, "Some cpus may have not or only partially been removed 
from '%s'.\n", pool);
+        fprintf(stderr, "If a cpu can't be added to another cpupool, add it to 
'%s' again and retry.\n", pool);
+    }
 
     rc = EXIT_SUCCESS;
 
-- 
2.6.2


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