On Thu, 3 Mar 2005, Oliver Baltz wrote: > my UML hangs while intensive processes that use the HDD. For example: > rgrep, upgrade,... > > UML-Hostsystem: 2.4.27-1-386, Intel ICH5 SATA 150-Controller > UML: 2.4.26-3um-1
I had a similar experience. I configured the UML with 256MB RAM, and put the image file in /dev/shm (tmpfs). However, the default size of tmpfs is half your physical memory (256 MB). When I did a big update, I/O buffers went above 128MB, and UML got what it called a "kernel mode signal 7" (SIGBUS). Limiting the RAM to 120MB (leaving a little space for overhead and other users) cured the problem completely. Making tmpfs bigger would also have helped. But don't enlarge it above swap space plus physical memory, because when you fill it up, there's no space for programs and the host kernel will panic. James F. Carter Voice 310 825 2897 FAX 310 206 6673 UCLA-Mathnet; 6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA 90095-1555 Email: [EMAIL PROTECTED] http://www.math.ucla.edu/~jimc (q.v. for PGP key) ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
