This patch fixes the default guest RAM size maximum to 80% of the host RAM to avoid swapping the host to death.
Cc: Asias He <[email protected]> Cc: Cyrill Gorcunov <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Prasad Joshi <[email protected]> Cc: Sasha Levin <[email protected]> Suggested-by: Ingo Molnar <[email protected]> Signed-off-by: Pekka Enberg <[email protected]> --- tools/kvm/kvm-run.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/tools/kvm/kvm-run.c b/tools/kvm/kvm-run.c index ec1e462..b9cdec2 100644 --- a/tools/kvm/kvm-run.c +++ b/tools/kvm/kvm-run.c @@ -213,6 +213,12 @@ static void kernel_usage_with_options(void) fprintf(stderr, "\nPlease see 'kvm run --help' for more options.\n\n"); } +/* + * If user didn't specify how much memory it wants to allocate for the guest, + * avoid filling the whole host RAM. + */ +#define RAM_SIZE_RATIO 0.8 + static u64 get_ram_size(int nr_cpus) { long available; @@ -226,7 +232,7 @@ static u64 get_ram_size(int nr_cpus) page_size = sysconf(_SC_PAGE_SIZE); - available = (nr_pages * page_size) >> MB_SHIFT; + available = ((nr_pages * page_size) >> MB_SHIFT) * RAM_SIZE_RATIO; if (ram_size > available) ram_size = available; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
