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Initial support for cache modules.

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Also fixed a minor bug in dec_vnode_ref_count(): the unusued vnode counter
was not decremented again when one vnode was removed.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10336 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2004-12-01 07:41:07 +00:00
parent 324fc66b90
commit 53b0609a4a
1 changed files with 5 additions and 3 deletions
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src/kernel/core/fs/vfs.cpp
+5 -3
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@@ -24,6 +24,7 @@
#include <vfs.h> #include <vfs.h>
#include <vm.h> #include <vm.h>
#include <vm_cache.h> #include <vm_cache.h>
#include <file_cache.h>
#include <khash.h> #include <khash.h>
#include <lock.h> #include <lock.h>
#include <kerrors.h> #include <kerrors.h>
@@ -52,7 +53,7 @@
#define MAX_SYM_LINKS SYMLINKS_MAX #define MAX_SYM_LINKS SYMLINKS_MAX
const static uint32 kMaxUnusedVnodes = 512; const static uint32 kMaxUnusedVnodes = 8192;
// This is the maximum number of unused vnodes that the system // This is the maximum number of unused vnodes that the system
// will keep around. // will keep around.
// It may be chosen with respect to the available memory or enhanced // It may be chosen with respect to the available memory or enhanced
@@ -645,10 +646,10 @@ dec_vnode_ref_count(struct vnode *vnode, bool reenter)
// there are too many unused vnodes so we free the oldest one // there are too many unused vnodes so we free the oldest one
// ToDo: evaluate this mechanism // ToDo: evaluate this mechanism
vnode = (struct vnode *)list_remove_head_item(&sUnusedVnodeList); vnode = (struct vnode *)list_remove_head_item(&sUnusedVnodeList);
hash_remove(sVnodeTable, vnode); hash_remove(sVnodeTable, vnode);
vnode->busy = true; vnode->busy = true;
freeNode = true; freeNode = true;
sUnusedVnodes--;
} }
} }
@@ -1532,6 +1533,7 @@ get_new_fd(int type, struct vnode *vnode, fs_cookie cookie, int openMode, bool k
return B_NO_MORE_FDS; return B_NO_MORE_FDS;
} }
cache_node_opened(vnode->cache, vnode->device, vnode->id);
return fd; return fd;
} }
@@ -2369,7 +2371,7 @@ vfs_init(kernel_args *args)
if (mutex_init(&sVnodeMutex, "vfs_vnode_lock") < 0) if (mutex_init(&sVnodeMutex, "vfs_vnode_lock") < 0)
panic("vfs_init: error allocating vnode lock\n"); panic("vfs_init: error allocating vnode lock\n");
return 0; return file_cache_init();
} }