Hi Ravi, On 03/19, Ravi Bangoria wrote: > > On 03/16/2018 11:20 PM, Oleg Nesterov wrote: > > > > And it seems that you are trying to confuse yourself, not only me ;) Just > > suppose that an application does mmap+munmap in a loop and the mapped region > > contains uprobe but not the counter. > > this is fine because ... Yes, I guess I tried to say "counter but not uprobe" but possibly I was actually confused. > Our initial design was to increment counter in install_breakpoint() but > uprobed instruction gets patched in a very early stage of binary loading > and vma that holds the counter may not be mapped yet. Yes, yes, I understand this is not that simple... > > Btw, why do we need a counter, not a boolean? Who else can modify it? > > Or different uprobes can share the same counter? > > Yes, multiple SDT markers can share the counter. OK, thanks. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
