Date: Tue, 5 Dec 2000 14:18:59 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: Matt Dillon <dillon@earth.backplane.com> Cc: peter@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: phys backed shm patch. Message-ID: <20001205141859.F8051@fw.wintelcom.net> In-Reply-To: <200012052144.eB5LiNT86399@earth.backplane.com>; from dillon@earth.backplane.com on Tue, Dec 05, 2000 at 01:44:23PM -0800 References: <20001205123456.D8051@fw.wintelcom.net> <200012052144.eB5LiNT86399@earth.backplane.com>
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* Matt Dillon <dillon@earth.backplane.com> [001205 13:44] wrote: > : > :Ok, I spent quite some time trying to figure out why postgresql > :would "hang" when using the 'kern.ipc.shm_use_phys' sysctl. > : > :It finally came down to some spinlocks that were being corrupted > :in a very tiny shared memory segment. > : > :It seems like the phys_pager doesn't correctly allocate when > :given a non PAGE_SIZE'd 'size' so then I think odd stuff happens > :to the memory in the pages: > > Yes, you are absolutely right. That's definitely a bug and your fix > is the correct one. k thnx. :) -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] "I have the heart of a child; I keep it in a jar on my desk." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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