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authorNicolas Lacasse <nlacasse@google.com>2020-06-16 08:47:04 -0700
committergVisor bot <gvisor-bot@google.com>2020-06-16 08:49:06 -0700
commit810748f5c9c72f713d81d14bcc89a8eb4ca49eb6 (patch)
tree7577a55e30f663378d4c7f6778bf3d6cc1e96dca /pkg/sentry/socket/hostinet/BUILD
parent3b0b1f104d963a1d11973c444934e6744ab7e79b (diff)
Port aio to VFS2.
In order to make sure all aio goroutines have stopped during S/R, a new WaitGroup was added to TaskSet, analagous to runningGoroutines. This WaitGroup is incremented with each aio goroutine, and waited on during kernel.Pause. The old VFS1 aio code was changed to use this new WaitGroup, rather than fs.Async. The only uses of fs.Async are now inode and mount Release operations, which do not call fs.Async recursively. This fixes a lock-ordering violation that can cause deadlocks. Updates #1035. PiperOrigin-RevId: 316689380
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