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use as many goroutines for ForgetInode op #79

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use as many goroutines for ForgetInode op #79

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18 changes: 11 additions & 7 deletions fuseutil/file_system.go
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Original file line number Diff line number Diff line change
Expand Up @@ -84,13 +84,15 @@ type FileSystem interface {
// requests").
func NewFileSystemServer(fs FileSystem) fuse.Server {
return &fileSystemServer{
fs: fs,
fs: fs,
opsForgetInode: make(chan int, 100000),
}
}

type fileSystemServer struct {
fs FileSystem
opsInFlight sync.WaitGroup
fs FileSystem
opsInFlight sync.WaitGroup
opsForgetInode chan int
}

func (s *fileSystemServer) ServeOps(c *fuse.Connection) {
Expand All @@ -113,11 +115,12 @@ func (s *fileSystemServer) ServeOps(c *fuse.Connection) {

s.opsInFlight.Add(1)
if _, ok := op.(*fuseops.ForgetInodeOp); ok {
// Special case: call in this goroutine for
// forget inode ops, which may come in a
// flurry from the kernel and are generally
// cheap for the file system to handle
s.handleOp(c, ctx, op)
// flurry from the kernel and we should
// to limit the number of goroutines
// one goroutine 2KB, 10w goroutine max 200MB
s.opsForgetInode <- 1
go s.handleOp(c, ctx, op)
} else {
go s.handleOp(c, ctx, op)
}
Expand Down Expand Up @@ -150,6 +153,7 @@ func (s *fileSystemServer) handleOp(

case *fuseops.ForgetInodeOp:
err = s.fs.ForgetInode(ctx, typed)
<-s.opsForgetInode

case *fuseops.MkDirOp:
err = s.fs.MkDir(ctx, typed)
Expand Down