> Hello Kirill, Hello Pavel, > > Kirill Korotaev wrote: > >>Oleg Nesterov noticed to me that the construction like >>(used in beancounter patches and free_uid()): >> >> local_irq_save(flags); >> if (atomic_dec_and_lock(&refcnt, &lock)) >> ... >> >>is not that good for preemtible kernels, since with preemption >>spin_lock() can schedule() to reduce latency. However, it won't schedule >>if interrupts are disabled. >> >>So this patch introduces atomic_dec_and_lock_irqsave() as a logical >>counterpart to atomic_dec_and_lock(). > > > You should probably send that one independently from the BC > patchset. Maybe, but BCs are the only user of this so far...
Thanks, Kirill ------------------------------------------------------------------------- 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
