acrn-hypervisor

mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2026-05-03 17:37:54 +00:00

Files

Yin Fengwei 9456d91b76 dm: hugetlb: add file lock to make sure huge page reserve atomic

Currently, DM only access /sys/kernel/mm/hugepages/hugepages-2048kB/
entries according to its own huge page requirement. So it could have
following race issue:

         DM1                                   DM2
      read nr pages
                                            read nr pages
                                            write DM2 nr pages
      write DM1 nr pages

Suppose we should write DM1 + DM2 nr page to kernel sysfs interface
to reserve enough huge page (DM1 + DM2). But actually only reserve
huge page requested by DM1.  Which could trigger one VM can't boot.
We can easily hit this issue if we enable multiple UOS auto boot
because more than one VM are started at almost same time.

We add file lock to make sure huge page reserving in DM atomic.

Tracked-On: #3729
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Wang Yu <yu1.wang@intel.com>

2019-09-27 15:12:36 +08:00

console.c

DM: remove unused function console_ptr_event

2019-05-24 11:51:00 +08:00

gc.c

dm: gc: clean up assert

2019-07-03 09:40:15 +08:00

hugetlb.c

dm: hugetlb: add file lock to make sure huge page reserve atomic

2019-09-27 15:12:36 +08:00

inout.c

dm: refine 'assert' in inout.c and post.c