On Wed, Aug 30, 2006 at 12:51:28PM +0200, Roman Zippel wrote: > Hi, > > On Wed, 30 Aug 2006, Oleg Nesterov wrote: > > > > Why does this need protection against interrupts? > > > > uidhash_lock can be taken from irq context. For example, > > delayed_put_task_struct() > > does __put_task_struct()->free_uid(). > > AFAICT it's called via rcu, does that mean anything released via rcu has > to be protected against interrupts?
No. You need protection only if you have are using some data that can also be used by the RCU callback. For example, if your RCU callback just calls kfree(), you don't have to do a spin_lock_bh(). Thanks Dipankar ------------------------------------------------------------------------- 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 _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
