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| author | Ingo Molnar <mingo@elte.hu> | 2008-10-28 16:26:12 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-28 16:26:12 +0100 |
| commit | 7a9787e1eba95a166265e6a260cf30af04ef0a99 (patch) | |
| tree | e730a4565e0318140d2fbd2f0415d18a339d7336 /Documentation/filesystems/relay.txt | |
| parent | 41b9eb264c8407655db57b60b4457fe1b2ec9977 (diff) | |
| parent | 0173a3265b228da319ceb9c1ec6a5682fd1b2d92 (diff) | |
Merge commit 'v2.6.28-rc2' into x86/pci-ioapic-boot-irq-quirks
Diffstat (limited to 'Documentation/filesystems/relay.txt')
| -rw-r--r-- | Documentation/filesystems/relay.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/filesystems/relay.txt b/Documentation/filesystems/relay.txt index 094f2d2f38b1..510b722667ac 100644 --- a/Documentation/filesystems/relay.txt +++ b/Documentation/filesystems/relay.txt @@ -294,6 +294,16 @@ user-defined data with a channel, and is immediately available (including in create_buf_file()) via chan->private_data or buf->chan->private_data. +Buffer-only channels +-------------------- + +These channels have no files associated and can be created with +relay_open(NULL, NULL, ...). Such channels are useful in scenarios such +as when doing early tracing in the kernel, before the VFS is up. In these +cases, one may open a buffer-only channel and then call +relay_late_setup_files() when the kernel is ready to handle files, +to expose the buffered data to the userspace. + Channel 'modes' --------------- |