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0f08586c71
It can be difficult to debug issues with BHs in production environments. Although BHs can usually be identified by looking up their ->cb() function pointer, this requires debug information for the program. It is also not possible to print human-readable diagnostics about BHs because they have no identifier. This patch adds a name to each BH. The name is not unique per instance but differentiates between cb() functions, which is usually enough. It's done by changing aio_bh_new() and friends to macros that stringify cb. The next patch will use the name field when reporting leaked BHs. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210414200247.917496-2-stefanha@redhat.com>