[haiku-bugs] Re: [Haiku] #3723: Improving disk performance by changing VirtualMemory path
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Sun, 12 Jun 2011 22:38:33 -0000
#3723: Improving disk performance by changing VirtualMemory path
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Reporter: haiqu | Owner: axeld
Type: enhancement | Status: new
Priority: normal | Milestone: R1
Component: Preferences/VirtualMemory | Version: R1/pre-alpha1
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by bonefish):
The `<fs_info.h>` C API is also available in the kernel. It allows you to
get the volume and root node ID for any mounted volume. Given such a pair
(aka node ref) you can employ the private VFS API
(`header/private/kernel/vfs.h`) to get a path (`vfs_entry_ref_to_path()`),
get the file's stat data (`vfs_stat_node_ref()`), or open it
(`vfs_entry_ref_to_vnode()` plus `vfs_open_vnode()`).
The disk device manager API might be interesting, if the volume for the
swap file is not even mounted yet and you need to find and/or mount it
first.
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Ticket URL: <http://dev.haiku-os.org/ticket/3723#comment:5>
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