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haiku/src/system/kernel/cache/vnode_store.h

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Added a basic vnode store, more or less the same as the old one. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8829 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-09-03 21:04:09 +04:00
/*
bonefish+axeld: * Removed the vm_cache/vm_store ref_count duality that besides being a bit ugly also created the page dameon cache retrieval problem: now, only areas (and cache consumers) retrieve a reference to the store (and therefore, the vnode). The page daemon doesn't need to care about this at all anymore, and the pseudo references of the vm_cache could be removed again. * Rearranged deletion of vnodes such that its ID can be reused directly after fs_remove_vnode() has been called. * vm_page_allocate_page() no longer panics when it runs out of pages, but just waits for new pages to become available using the new sFreeCondition condition variable - to make sure this happens in an acceptable time frame, it'll trigger a run of the low memory handlers. * Implemented a page_thief() that steals inactive pages from caches and puts them into the free queue. It runs as a low memory handler. * The file cache now sets the usage count on the pages it inserts into the cache (needs some rework though, cache_io() doesn't do it yet). * Instead of panicking, the kernel will currently dead lock in low memory situations, since BFS does a bit too much in bfs_release_vnode(). * Some minor cleanup. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22315 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-26 04:20:23 +04:00
* Copyright 2004-2007, Axel Dörfler, axeld@pinc-software.de.
Removed the vnode_store::size field - it's no longer needed. Instead, vm_cache::virtual_size is now used by the file cache code. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10202 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-11-23 06:22:35 +03:00
* Distributed under the terms of the MIT License.
*/
Added a basic vnode store, more or less the same as the old one. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8829 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-09-03 21:04:09 +04:00
#ifndef VNODE_STORE_H
#define VNODE_STORE_H
* vm.h no longer includes vm_types.h - only those that actually need access to the private VM types are including vm_types.h now. * Removed vm_page, vm_area, vm_cache, and vm_address_space typedefs; it's cleaner this way, and the actual types are only used in C++ files now, anyway. * And that caused changes in many files... * Made commpage.h self-containing. * Minor cleanup. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22329 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-27 16:21:33 +04:00
#include <vm_types.h>
Added a basic vnode store, more or less the same as the old one. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8829 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-09-03 21:04:09 +04:00
struct vnode_store {
bonefish+axeld: * Removed the vm_cache/vm_store ref_count duality that besides being a bit ugly also created the page dameon cache retrieval problem: now, only areas (and cache consumers) retrieve a reference to the store (and therefore, the vnode). The page daemon doesn't need to care about this at all anymore, and the pseudo references of the vm_cache could be removed again. * Rearranged deletion of vnodes such that its ID can be reused directly after fs_remove_vnode() has been called. * vm_page_allocate_page() no longer panics when it runs out of pages, but just waits for new pages to become available using the new sFreeCondition condition variable - to make sure this happens in an acceptable time frame, it'll trigger a run of the low memory handlers. * Implemented a page_thief() that steals inactive pages from caches and puts them into the free queue. It runs as a low memory handler. * The file cache now sets the usage count on the pages it inserts into the cache (needs some rework though, cache_io() doesn't do it yet). * Instead of panicking, the kernel will currently dead lock in low memory situations, since BFS does a bit too much in bfs_release_vnode(). * Some minor cleanup. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22315 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-26 04:20:23 +04:00
vm_store vm;
struct vnode* vnode;
* Added a acquire_unreferenced_ref() to vm_store * his has to be used by the page writer to make sure the vnode is still valid. * This should have been the final nail on the Luposian bug - I haven't tested it yet, but we'll certainly see :-) git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22462 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-06 19:35:38 +04:00
dev_t device;
ino_t inode;
bonefish+axeld: * Removed the vm_cache/vm_store ref_count duality that besides being a bit ugly also created the page dameon cache retrieval problem: now, only areas (and cache consumers) retrieve a reference to the store (and therefore, the vnode). The page daemon doesn't need to care about this at all anymore, and the pseudo references of the vm_cache could be removed again. * Rearranged deletion of vnodes such that its ID can be reused directly after fs_remove_vnode() has been called. * vm_page_allocate_page() no longer panics when it runs out of pages, but just waits for new pages to become available using the new sFreeCondition condition variable - to make sure this happens in an acceptable time frame, it'll trigger a run of the low memory handlers. * Implemented a page_thief() that steals inactive pages from caches and puts them into the free queue. It runs as a low memory handler. * The file cache now sets the usage count on the pages it inserts into the cache (needs some rework though, cache_io() doesn't do it yet). * Instead of panicking, the kernel will currently dead lock in low memory situations, since BFS does a bit too much in bfs_release_vnode(). * Some minor cleanup. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22315 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-26 04:20:23 +04:00
void* file_cache_ref;
Added a basic vnode store, more or less the same as the old one. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8829 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-09-03 21:04:09 +04:00
};
#endif /* VNODE_STORE_H */
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