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Re: POSIX shared memory support


  • From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
  • To: Magnus Hagander <magnus(at)hagander(dot)net>
  • Cc: James Mansion <james(at)mansionfamily(dot)plus(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, pgsql-hackers(at)postgresql(dot)org
  • Subject: Re: POSIX shared memory support
  • Date: Mon, 31 Mar 2008 16:11:38 -0400
  • Message-id: <20441.1206994298@sss.pgh.pa.us> <text/plain>

Magnus Hagander <magnus(at)hagander(dot)net> writes:
> James Mansion wrote:
>> (confused) Why can't you use mmap of /dev/zero and inherit the fd
>> into child processes?

> This is what we do on win32 today. We don't use the sysv emulation
> layer anymore.

Did we ever find an interlock that makes the win32 implementation
safe against the postmaster-dead-children-still-alive scenario?

			regards, tom lane



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