On 3/26/24 8:03 PM, Jason Gunthorpe wrote:
On Tue, Mar 26, 2024 at 06:09:34PM +0500, Muhammad Usama Anjum wrote:
Even after applying this config patch and following snippet (which doesn't terminate the program if mmap doesn't allocate exactly as the hint), I'm finding failed tests.
@@ -1746,7 +1748,7 @@ FIXTURE_SETUP(iommufd_dirty_tracking) assert((uintptr_t)self->buffer % HUGEPAGE_SIZE == 0); vrc = mmap(self->buffer, variant->buffer_size, PROT_READ | PROT_WRITE, mmap_flags, -1, 0);
assert(vrc == self->buffer);
assert(vrc == self->buffer);// ???On x86: # Totals: pass:176 fail:4 xfail:0 xpass:0 skip:0 error:0 On ARM64: # Totals: pass:166 fail:14 xfail:0 xpass:0 skip:0 error:0
The log files are attached.
You probably don't have enough transparent huge pages available to the process
echo 1024 > /proc/sys/vm/nr_hugepages
After making huge pages available, the iommufd test always passed on x86. But there are still failures on arm64. I'm looking into the failures.
cat /proc/sys/vm/nr_hugepages 1024 ./iommufd ... # Totals: pass:166 fail:14 xfail:0 xpass:0 skip:0 error:0
Jason