On 1/15/08, Rik van Riel <[EMAIL PROTECTED]> wrote: > > On Tue, 15 Jan 2008 23:55:17 +0100 > "Daniel Spång" <[EMAIL PROTECTED]> wrote: > > > The notification fires after only ~100 MB allocated, i.e., when page > > reclaim is beginning to nag from page cache. Isn't this a bit early? > > Repeating the test with swap enabled results in a notification after > > ~600 MB allocated, which is more reasonable and just before the system > > starts to swap. > > Your issue may have more to do with the fact that the > highmem zone is 128MB in size and some balancing issues > between __alloc_pages and try_to_free_pages.
I don't think so. I ran the test again without highmem and noticed the same behaviour: $ cat /proc/meminfo MemTotal: 895876 kB MemFree: 111292 kB Buffers: 924 kB Cached: 768664 kB SwapCached: 0 kB Active: 9196 kB Inactive: 767480 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 895876 kB LowFree: 111292 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 32 kB Writeback: 0 kB AnonPages: 7108 kB Mapped: 1224 kB Slab: 4288 kB SReclaimable: 1316 kB SUnreclaim: 2972 kB PageTables: 448 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 447936 kB Committed_AS: 19676 kB VmallocTotal: 122872 kB VmallocUsed: 904 kB VmallocChunk: 121864 kB Start to allocate memory, 10 MB every second, exit on notification which happened after 110 MB. $ cat /proc/meminfo #after MemTotal: 895876 kB MemFree: 116748 kB Buffers: 904 kB Cached: 762944 kB SwapCached: 0 kB Active: 12864 kB Inactive: 758064 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 895876 kB LowFree: 116748 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 4 kB Writeback: 0 kB AnonPages: 7108 kB Mapped: 1224 kB Slab: 4284 kB SReclaimable: 1316 kB SUnreclaim: 2968 kB PageTables: 448 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 447936 kB Committed_AS: 19676 kB VmallocTotal: 122872 kB VmallocUsed: 904 kB VmallocChunk: 121864 kB -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
