diff options
Diffstat (limited to 'pkg/sentry/pgalloc/save_restore.go')
| -rw-r--r-- | pkg/sentry/pgalloc/save_restore.go | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/pkg/sentry/pgalloc/save_restore.go b/pkg/sentry/pgalloc/save_restore.go index cf169af55..9534d1aed 100644 --- a/pkg/sentry/pgalloc/save_restore.go +++ b/pkg/sentry/pgalloc/save_restore.go @@ -28,6 +28,15 @@ import ( "gvisor.googlesource.com/gvisor/pkg/state" ) +// FlushEvictions blocks until f has finished evicting all evictable +// allocations. +func (f *MemoryFile) FlushEvictions() { + f.mu.Lock() + f.startEvictionsLocked() + f.mu.Unlock() + f.evictionWG.Wait() +} + // SaveTo writes f's state to the given stream. func (f *MemoryFile) SaveTo(w io.Writer) error { // Wait for reclaim. @@ -40,6 +49,11 @@ func (f *MemoryFile) SaveTo(w io.Writer) error { f.mu.Lock() } + // Ensure that there are no pending evictions. + if len(f.evictable) != 0 { + panic(fmt.Sprintf("evictions still pending for %d users; call FlushEvictions before SaveTo", len(f.evictable))) + } + // Ensure that all pages that contain data have knownCommitted set, since // we only store knownCommitted pages below. zeroPage := make([]byte, usermem.PageSize) |