diff options
| author | Eivind Eklund <eivind@FreeBSD.org> | 2000-09-19 10:36:19 +0000 |
|---|---|---|
| committer | Eivind Eklund <eivind@FreeBSD.org> | 2000-09-19 10:36:19 +0000 |
| commit | c16dc61bd2ca6c440489ba03aabb99ad0a551025 (patch) | |
| tree | 0527b45d92845898d7d0cea989a6c8a4b47cde61 | |
| parent | b0d17ba69e0b517fe294f1caa7b489caa2ae1249 (diff) | |
Notes
| -rw-r--r-- | sys/conf/NOTES | 13 | ||||
| -rw-r--r-- | sys/i386/conf/NOTES | 13 |
2 files changed, 24 insertions, 2 deletions
diff --git a/sys/conf/NOTES b/sys/conf/NOTES index dcb3bd171139..42ded89e37d9 100644 --- a/sys/conf/NOTES +++ b/sys/conf/NOTES @@ -718,6 +718,18 @@ options EXT2FS # inclusion on shell boxes. options VFS_AIO +# Enable the code UFS IO optimization through the VM system. This allows +# use VM operations instead of copying operations when possible. +# +# Even with this enabled, actual use of the code is still controlled by the +# sysctl vfs.ioopt. 0 gives no optimization, 1 gives normal (use VM +# operations if a request happens to fit), 2 gives agressive optimization +# (the operations are split to do as much as possible through the VM system.) +# +# Enabling this will probably not give an overall speedup except for +# special workloads. +options ENABLE_VFS_IOOPT + # Cryptographically secure random number generator; /dev/[u]random device random @@ -2543,7 +2555,6 @@ options DEBUG options DEBUG_LINUX #options DISABLE_PSE options ENABLE_ALART -options ENABLE_VFS_IOOPT options FB_DEBUG options FB_INSTALL_CDEV options FE_8BIT_SUPPORT diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES index dcb3bd171139..42ded89e37d9 100644 --- a/sys/i386/conf/NOTES +++ b/sys/i386/conf/NOTES @@ -718,6 +718,18 @@ options EXT2FS # inclusion on shell boxes. options VFS_AIO +# Enable the code UFS IO optimization through the VM system. This allows +# use VM operations instead of copying operations when possible. +# +# Even with this enabled, actual use of the code is still controlled by the +# sysctl vfs.ioopt. 0 gives no optimization, 1 gives normal (use VM +# operations if a request happens to fit), 2 gives agressive optimization +# (the operations are split to do as much as possible through the VM system.) +# +# Enabling this will probably not give an overall speedup except for +# special workloads. +options ENABLE_VFS_IOOPT + # Cryptographically secure random number generator; /dev/[u]random device random @@ -2543,7 +2555,6 @@ options DEBUG options DEBUG_LINUX #options DISABLE_PSE options ENABLE_ALART -options ENABLE_VFS_IOOPT options FB_DEBUG options FB_INSTALL_CDEV options FE_8BIT_SUPPORT |