This message says that you're trying to restore a backup containing EA (ACLs are a subset of EA) on some filesystem which doesn't support them (either because the filesystem itself doesn't support EA - like a FAT filesystem - or because the kernel itself doesn't have support for EAs.
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is there any kernel should be supported?
EA & ACL ? or EA is enough?
This message says that you're trying to restore a backup containing EA (ACLs are a subset of EA) on some filesystem which doesn't support them (either because the filesystem itself doesn't support EA - like a FAT filesystem - or because the kernel itself doesn't have support for EAs.
add EA && ACL to kernel, no Warning message printed!