diff options
| author | Jamie Liu <jamieliu@google.com> | 2020-09-18 13:23:41 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-09-18 13:25:35 -0700 |
| commit | ca4ecf481d617edfae22a5735a657d60186392e1 (patch) | |
| tree | 539dc1cef2df460610f96e488efc672c92fc7b1a /pkg/sentry/mm/syscalls.go | |
| parent | f911b43f05f88807a1e36adc6ab3b7c8cf8ec2ee (diff) | |
Use a tmpfs file for shared anonymous and /dev/zero mmap on VFS2.
This is more consistent with Linux (see comment on MM.NewSharedAnonMappable()).
We don't do the same thing on VFS1 for reasons documented by the updated
comment.
PiperOrigin-RevId: 332514849
Diffstat (limited to 'pkg/sentry/mm/syscalls.go')
| -rw-r--r-- | pkg/sentry/mm/syscalls.go | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/pkg/sentry/mm/syscalls.go b/pkg/sentry/mm/syscalls.go index 4c9a575e7..a2555ba1a 100644 --- a/pkg/sentry/mm/syscalls.go +++ b/pkg/sentry/mm/syscalls.go @@ -24,7 +24,6 @@ import ( "gvisor.dev/gvisor/pkg/sentry/kernel/futex" "gvisor.dev/gvisor/pkg/sentry/limits" "gvisor.dev/gvisor/pkg/sentry/memmap" - "gvisor.dev/gvisor/pkg/sentry/pgalloc" "gvisor.dev/gvisor/pkg/syserror" "gvisor.dev/gvisor/pkg/usermem" ) @@ -93,18 +92,6 @@ func (mm *MemoryManager) MMap(ctx context.Context, opts memmap.MMapOpts) (userme } } else { opts.Offset = 0 - if !opts.Private { - if opts.MappingIdentity != nil { - return 0, syserror.EINVAL - } - m, err := NewSharedAnonMappable(opts.Length, pgalloc.MemoryFileProviderFromContext(ctx)) - if err != nil { - return 0, err - } - defer m.DecRef(ctx) - opts.MappingIdentity = m - opts.Mappable = m - } } if opts.Addr.RoundDown() != opts.Addr { |