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Re: [Xen-devel] [xen-unstable test] 112855: regressions - trouble: blocked/broken/fail/pass

On 08/28/2017 10:52 AM, Jan Beulich wrote:
>>>> On 28.08.17 at 16:24, <boris.ostrovsky@xxxxxxxxxx> wrote:
>>>> As for periodically testing process_pending_softirqs() we may still want
>>>> to do this in alloc_heap_pages(), even without CONFIG_SCRUB_DEBUG.
>>> For my taste, alloc_heap_pages() is the wrong place for such
>>> calls.
>> But the loop is in alloc_heap_pages() --- where else would you be testing?
> It can only reasonably be the callers of alloc_heap_pages() imo.
> A single call to it should never trigger the watchdog, 

check_one_page() is rather slow so for a large order allocation even
with clean heap the 'for' loop may take quite some time. Whether it
could trip the watchdog -- I don't know.


> only calls
> themselves sitting in a loop should be potential candidates for
> causing such.

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