Re: hub does disconnect when resuming
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Sat, 3 Feb 2007, Oliver Neukum wrote: > Am Samstag, 3. Februar 2007 23:02 schrieb Alan Stern: > > Obviously we can't afford to use a single dedicated buffer like this. > > Each thread reading a hub's port status will have to provide its own > > buffer, or more simply, we will have to allocate a buffer dynamically for > > every read instead of using a single static buffer. I don't like the > > overhead of all those kmalloc and kfree calls for a 4-byte buffer, but the > > simplicity is very attractive. > > > > What do you think is the best way to solve this? > > If you want simplicity, I'd suggest serialization. kmalloc for 4 bytes > is overkill. I think it is even faster if we block on the cases there's > a collision that go through kmalloc/kfree each time. That makes sense. A single mutex would do the job. I'll post a patch later on. Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel