Kovid Goyal 2e4f3dab41 Use fallocate() rather than truncate() when creating SHM memory ...

With truncate() the OS might not actually allocate the space leading to
a SIGBUS if /dev/shm runs out of space when actually using the mmap.

By using fallocate we ensure that once the SHM mmap is created it wont
fail

2023-09-23 09:53:17 +05:30

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