[Xen-devel] regression from c/s 22071:c5aed2e049bc (ept: Put locks around ept_get_entry) ?

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

George,

with ept_get_entry() calling ept_pod_check_and_populate(), which in
turn unconditionally calls p2m_lock(), we got a report of the BUG() in
p2m_lock() triggering (in a backport of the patch on top of 4.0.1 - the
logic seems unchanged in -unstable, and hence the issue ought to
similarly exist there). Wouldn't therefore ept_pod_check_and_populate(),
only ever called from ept_get_entry(), not need to do any locking on
its own at all?

Thanks, Jan


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