Fix pty test in vscode integrated terminal - #4
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abernardeau-wallix wants to merge 5 commits into
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Refresh a host checkout's index on the host, after waiting out the second `reset --hard` stamped it in, so no entry is left racily clean. Otherwise the guest re-hashes every file on its first git command, over virtio-fs, on every job.
Vendor ipstack 1.0.1 with a patch that resets a guest-bound flow whose retransmissions are exhausted, instead of leaving it Established with a permanent hole that stalls the guest for the rest of the job. Hold a segment for six retransmissions (63s, up from the default three / 7s) so a switch the host briefly fails to schedule no longer costs the flow.
A read-only share keeps its DAX windows across REMOVEMAPPING rather than tearing each one down: the mapping cannot be written through, and the next SETUPMAPPING replaces it in place. This drops nearly half the host mmaps of a guest reading a large source tree. The read-write path instead merges a batch's adjacent ranges into one mmap.
A share's window now maps only regular files at or above a size floor (`dax=inode`) rather than every file: the guest mounts the share dax=inode and the host flags the qualifying entries, since small files never repay a mapping's cost. `vk run --dax`, x-virtkit.dax and [executor.vm] dax take <size>:always for the old behaviour and <size>:inode=<min> to move the floor.
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