From c20c7992a06434dd4a9624a57aee608acfc33c12 Mon Sep 17 00:00:00 2001
From: gmd20
Date: Tue, 8 Dec 2020 15:27:23 +0800
Subject: 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
---
 Documentation/MANPAGE.md | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'Documentation')

diff --git a/Documentation/MANPAGE.md b/Documentation/MANPAGE.md
index 7ac0a1b..a984aa6 100644
--- a/Documentation/MANPAGE.md
+++ b/Documentation/MANPAGE.md
@@ -241,6 +241,9 @@ Only for forward mode: automatically unmount the filesystem if it has been idle
 for the specified duration. Durations can be specified like "500s" or "2h45m".
 0 (the default) means stay mounted indefinitely.
 
+#### -kernel_cache
+Enable the kernel_cache option of the FUSE filesystem, see fuse(8) for details.
+
 #### -ko
 Pass additional mount options to the kernel (comma-separated list).
 FUSE filesystems are mounted with "nodev,nosuid" by default. If gocryptfs
-- 
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