[Bug 217138] head (e.g.) -r315870 for arm64: sh vs. jemalloc asserts: include/jemalloc/internal/tsd.h:687: Failed assertion: "tsd_booted" once swapped in after being swapped out (comment 10)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217138

--- Comment #33 from Mark Millard <markmi at dsl-only.net> ---
Created attachment 181258
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=181258&action=edit
Test program with thousands of 14 KiByte allocations

The test program that has thousands of 14 KiByte
allocations usually ends up with them all being
zeroed in the parent and child of the fork.

But I've had a couple of runs where a much smaller
prefix was messed up and then there were normal,
expected values.

#define region_size (14u*1024u)
. . .
#define num_regions (256u*1024u*1024u/region_size)

So num_regions==18724, using up most of 256 MiBytes.

Note: each region has its own 14 KiByte allocation.

But dyn_regions[1296].array[0] in one example was
the first normal value.

In another example dyn_regions[2180].array[4096] was
the first normal value.

The last is interesting for being part way through
an allocation's space. That but aligning with a 4
KiByte page size would seem odd for a pure-jemalloc
issue.

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