[PATCH v2 0/2] Adjustment after introducing ASSERT_ALLOC_CONTEXT

Henry Wang posted 2 patches 2 weeks, 4 days ago
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git fetch https://gitlab.com/xen-project/patchew/xen tags/patchew/20220506055201.999277-1-Henry.Wang@arm.com
xen/arch/arm/smpboot.c    | 12 +++++++++---
xen/common/page_alloc.c   |  7 -------
xen/common/xmalloc_tlsf.c |  2 +-
xen/include/xen/irq.h     |  7 +++++++
4 files changed, 17 insertions(+), 11 deletions(-)
[PATCH v2 0/2] Adjustment after introducing ASSERT_ALLOC_CONTEXT
Posted by Henry Wang 2 weeks, 4 days ago
With the enhanced ASSERT_ALLOC_CONTEXT, calling request_irq before
local_irq_enable on secondary cores on Arm will lead to

(XEN) Xen call trace:
(XEN) [<000000000021d86c>] alloc_xenheap_pages+0x74/0x194 (PC)
(XEN) [<000000000021d864>] alloc_xenheap_pages+0x6c/0x194 (LR)
(XEN) [<0000000000229e90>] xmalloc_tlsf.c#xmalloc_pool_get+0x1c/0x28
(XEN) [<000000000022a270>] xmem_pool_alloc+0x21c/0x448
(XEN) [<000000000022a8dc>] _xmalloc+0x8c/0x290
(XEN) [<000000000026b57c>] request_irq+0x40/0xb8
(XEN) [<0000000000272780>] init_timer_interrupt+0x74/0xcc
(XEN) [<000000000027212c>] start_secondary+0x1b4/0x238
(XEN) [<0000000084000200>] 0000000084000200
(XEN)
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 4:
(XEN) Assertion '!in_irq() && (local_irq_is_enabled() ||
num_online_cpus() <= 1)' failed at common/page_alloc.c:2212
(XEN) ****************************************

on systems without a big enough pool for xmalloc() to cater the
requested size. To solve this issue, this series introduces two
patches. The first one defers the calling of request_irq on
secondary CPUs after local_irq_enable on Arm. The second one
moves the definition of ASSERT_ALLOC_CONTEXT to header and uses
the ASSERT_ALLOC_CONTEXT to replace the original assertion in
xmalloc().

Henry Wang (2):
  xen/arm: Defer request_irq on secondary CPUs after local_irq_enable
  xen/common: Use enhanced ASSERT_ALLOC_CONTEXT in xmalloc()

 xen/arch/arm/smpboot.c    | 12 +++++++++---
 xen/common/page_alloc.c   |  7 -------
 xen/common/xmalloc_tlsf.c |  2 +-
 xen/include/xen/irq.h     |  7 +++++++
 4 files changed, 17 insertions(+), 11 deletions(-)

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2.25.1