On Fri, Nov 04, 2005 at 14:43:47 +0100, Jesper Juhl wrote: > On 11/4/05, Bahadir Balban <bilgehan.balban@xxxxxxxxx> wrote: > > Hi, > > > > I want to log data, (mainly usb transactions) into a file from within > > the kernel. The code writing to the file may well be running in > > interrupt context, so it won't be associated with a process. > > You really don't want to do file I/O from within the kernel. I addition, you CAN'T do file I/O without process context. (because it takes a semaphore, does allocation and other funny stuff that needs to be able to sleep). > > What is > > the best way to achieve this? > > Get the data to userspace via printk/sysfs/netlink or some such, then > write the data to a file in userspace. I suppose you meant to say procfs, not sysfs. Sysfs is a specific way of accessing kobject properties. Procfs is much more general, so it can be (ab)used for things like this. -- Jan 'Bulb' Hudec <bulb@xxxxxx>
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