Date: Fri, 12 Jul 2013 11:38:33 +0200 From: Alberto Villa <avilla@FreeBSD.org> To: Chris H <bsd-lists@1command.com> Cc: freebsd-stable <freebsd-stable@freebsd.org>, freebsd-amd64 <freebsd-amd64@freebsd.org> Subject: Re: What are the ideal ranges for kern.ipc.shm*? Message-ID: <CAJp7RHZzpyNKvhrWeEQ7kemwn%2BszYQnAvAEAjNKtKcfbRhsr3Q@mail.gmail.com> In-Reply-To: <4640843f1a35075d295f99aa9e8ed951.authenticated@ultimatedns.net> References: <4640843f1a35075d295f99aa9e8ed951.authenticated@ultimatedns.net>
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On Fri, Jul 12, 2013 at 5:24 AM, Chris H <bsd-lists@1command.com> wrote: > Greetings, > Over the years using the xfce4 desktop, I would occasionally receive > SHM ERROR messages. As they never interfered (so's I could notice), I > always put off attempting to track the cause down. However, now having > performed a fairly major upgrade (~1yr since last), The error appears > to greatly affect KDE4 (used to use kde3) applications I run within > xfce4. The windows don't re-draw correctly, and I receive additional > errors,as well: > ... > Resource id: 0x0 > X Error: BadDrawable (invalid Pixmap or Window parameter) 9 > Major opcode: 62 (X_CopyArea) > Resource id: 0x0 > ... > After much searching, it would appear to be related to the > kern.ipc.shm* values. $ cat /usr/ports/x11-toolkits/qt4-gui/pkg-message Qt paint engine makes common use of shared memory. To avoid MIT-SHM errors (i.e., blank windows), you probably need to raise shared memory limits in loader.conf(5). The following should be safe values for the KDE Plasma Desktop: kern.ipc.shmall=32768 kern.ipc.shmmni=1024 kern.ipc.shmseg=1024 -- Alberto Villa, FreeBSD committer <avilla@FreeBSD.org> http://people.FreeBSD.org/~avilla
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