On Fri, 13 Apr 2007 01:54:28 +0000 (GMT) <[EMAIL PROTECTED]> wrote: > Hi all, > > Maybe someone here knows better. > > I have several user-mode processes using shared mmap. There can be several > reader processes and only one writer. Readers access the shared region > frequently, writer seldom. > > Naturally, multi-reader/single-writer locks works best. I tried this with > futex on 2.6.9-42.EL. However, if one of the processes is killed/exits, the > lock doesn't get released. > > I can trap the signal to release the lock, but not all signals like kill. > > Anyway I can achieve this without a potential deadlock? >
Robust futexes: http://lwn.net/Articles/172149/ But I don't know whether RH backported them into RHEL4. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
