From 3c6fe98eb1e5dada2613664182ead18be9e68819 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Tue, 20 Jun 2017 21:22:00 +0200
Subject: contentenc: use sync.Pool memory pools for encryption

We use two levels of buffers:

1) 4kiB+overhead for each ciphertext block
2) 128kiB+overhead for each FUSE write (32 ciphertext blocks)

This commit adds a sync.Pool for both levels.

The memory-efficiency for small writes could be improved,
as we now always use a 128kiB buffer.
---
 internal/fusefrontend/file.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'internal/fusefrontend')

diff --git a/internal/fusefrontend/file.go b/internal/fusefrontend/file.go
index 5b0a254..f70c9a5 100644
--- a/internal/fusefrontend/file.go
+++ b/internal/fusefrontend/file.go
@@ -311,6 +311,8 @@ func (f *file) doWrite(data []byte, off int64) (uint32, fuse.Status) {
 	}
 	// Write
 	_, err = f.fd.WriteAt(ciphertext, cOff)
+	// Return memory to cWritePool
+	f.fs.contentEnc.CWritePut(ciphertext)
 	if err != nil {
 		tlog.Warn.Printf("doWrite: Write failed: %s", err.Error())
 		return 0, fuse.ToStatus(err)
-- 
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