>>>>> On Wed, 20 Aug 2008 12:00:43 -0700, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> said:
Andrew>I don't think anybody has even thought about the shmmax default in
Andrew> years.
IIRC, Matt (explicit CC: added) did a review of IPC tunables and how
they are changed in the distributions.
Andrew> It would be useful to get distro input on this. Do they
Andrew> override the kernel default at boot time? If so, what do
Andrew> they do?
OpenSuse (11.0 at least) has this:
-#define SHMMAX 0x2000000 /* max shared seg size (bytes) */
+#define SHMMAX ULONG_MAX /* max shared seg size (bytes) */
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