diff options
| author | gmd20 | 2020-12-08 15:27:23 +0800 |
|---|---|---|
| committer | Jakob Unterwurzacher | 2020-12-20 09:55:04 +0100 |
| commit | c20c7992a06434dd4a9624a57aee608acfc33c12 (patch) | |
| tree | a7680a03fcc0f66a3b6bd468090c7e2d8c3cc7ca /internal/fusefrontend | |
| parent | 14dac373c27aca96e341ac74ca750cbf7a6ae5eb (diff) | |
main: add "-kernel_cache" flag
This option is similar to fuse(8) kernel_cache
Verified using vmtouch.
Without -kernel_cache:
$ dd if=/dev/zero of=foo bs=1M count=10 ; vmtouch -t foo ; vmtouch foo
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0,0242321 s, 433 MB/s
Files: 1
Directories: 0
Touched Pages: 2560 (10M)
Elapsed: 0.011159 seconds
Files: 1
Directories: 0
Resident Pages: 0/2560 0/10M 0%
Elapsed: 0.000993 seconds
With -kernel_cache:
$ dd if=/dev/zero of=foo bs=1M count=10 ; vmtouch -t foo ; vmtouch foo
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0,0244015 s, 430 MB/s
Files: 1
Directories: 0
Touched Pages: 2560 (10M)
Elapsed: 0.011564 seconds
Files: 1
Directories: 0
Resident Pages: 2560/2560 10M/10M 100%
Elapsed: 0.000369 seconds
Diffstat (limited to 'internal/fusefrontend')
| -rw-r--r-- | internal/fusefrontend/args.go | 2 | ||||
| -rw-r--r-- | internal/fusefrontend/node.go | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/internal/fusefrontend/args.go b/internal/fusefrontend/args.go index f822650..5eb6bff 100644 --- a/internal/fusefrontend/args.go +++ b/internal/fusefrontend/args.go @@ -44,4 +44,6 @@ type Args struct { // which are a performance problem for writes. See // https://github.com/rfjakob/gocryptfs/issues/515 for details. Suid bool + // Enable the FUSE kernel_cache option + KernelCache bool } diff --git a/internal/fusefrontend/node.go b/internal/fusefrontend/node.go index bc4eb3b..80d642c 100644 --- a/internal/fusefrontend/node.go +++ b/internal/fusefrontend/node.go @@ -190,6 +190,10 @@ func (n *Node) Open(ctx context.Context, flags uint32) (fh fs.FileHandle, fuseFl rn.openWriteOnlyLock.RLock() defer rn.openWriteOnlyLock.RUnlock() + if rn.args.KernelCache { + fuseFlags = fuse.FOPEN_KEEP_CACHE + } + // Open backing file fd, err := syscallcompat.Openat(dirfd, cName, newFlags, 0) // Handle a few specific errors |