On Wed, 2008-09-17 at 07:15 -0700, Joe Pruett wrote: > On Wed, 17 Sep 2008, Ian Kent wrote: > > > On Tue, 2008-09-16 at 17:22 -0700, Joe Pruett wrote: > >> it looks like some recent changes to both autofs v4 and v5 has caused the > >> siogcifconf buffer to be only 128 bytes. this means that on our servers, > >> it can't correctly match a local address since that is only enough room > >> for 3 addresses and we're in the middle of a renumbering so we have 5-10 > >> addresses per machine. this was working fine until i just updated to > >> centos 4.7. from looking at the code, it looks like someone created a > >> MAX_IF_BUF #define at 2048, but didn't use it for the ioctl call. is that > >> a mistake? > >> > >> i'll try a patched rpm locally and make sure this is the source of my > >> woes. > > > > Yeah, known issue. > > It's resolved in RHEL-5.3. > > it seems like it got worse with the latest 4.7 stuff. maybe i just didn't > notice machines talking to themselves over nfs previously. has it always > been 128 bytes?
Only the autofs5 package in 4.7 would be affected by this. Version 5 has had this mistake from the beginning. > > i'm concerned about the patch for my web hosting machine. right now it > has over 1024 interfaces. the amount of time all that malloc/free is > going to take for every mount seems pretty expensive. would any kind of > caching make sense? Yeah, that's not good but I have to do something to fix it. We could double the buffer size each time we allocate it but that would lead to considerable waste. Or maybe increasing the increment to 4k would be better. The current 2k will lead to 10 or 11 allocations. Ian _______________________________________________ autofs mailing list [email protected] http://linux.kernel.org/mailman/listinfo/autofs
