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| author | Alan Stern <stern@rowland.harvard.edu> | 2011-11-17 16:41:35 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-18 11:09:07 -0800 |
| commit | 3f5eb8d5688a5266ab943cf94aebe4c0eea726a3 (patch) | |
| tree | f91c3a0743c1c7058704b20517f4c533c4a6dbb8 /Documentation/kernel-parameters.txt | |
| parent | add1aaeabe6b08ed26381a2a06e505b2f09c3ba5 (diff) | |
| download | lwn-3f5eb8d5688a5266ab943cf94aebe4c0eea726a3.tar.gz lwn-3f5eb8d5688a5266ab943cf94aebe4c0eea726a3.zip | |
USB: make the usbfs memory limit configurable
The 16-MB global limit on memory used by usbfs isn't suitable for all
people. It's a reasonable default, but there are applications
(especially for SuperSpeed devices) that need a lot more.
This patch (as1498) creates a writable module parameter for usbcore to
control the global limit. The default is still 16 MB, but users can
change it at runtime, even after usbcore has been loaded. As a
special case, setting the value to 0 is treated the same as the hard
limit of 2047 MB.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index a0c5c5f4fce6..72c68bbec5d4 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2632,6 +2632,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. [USB] Start with the old device initialization scheme (default 0 = off). + usbcore.usbfs_memory_mb= + [USB] Memory limit (in MB) for buffers allocated by + usbfs (default = 16, 0 = max = 2047). + usbcore.use_both_schemes= [USB] Try the other device initialization scheme if the first one fails (default 1 = enabled). |