Greetings, (Please CC responses as I am not subscribed to the list. Thanks!)
I've recently started experiencing the following problem on one of my Linux servers: allocation failed: out of vmalloc space - use vmalloc=<size> to increase size. allocation failed: out of vmalloc space - use vmalloc=<size> to increase size. XFS: possible memory allocation deadlock in kmem_alloc (mode:0x2d0) XFS: possible memory allocation deadlock in kmem_alloc (mode:0x2d0) ...and so on until it completely locks up and needs reboot. >From what I can tell from fs/xfs/linux-2.6/kmem.c, the XFS message is just another confirmation that the machine has run out of vmalloc space. The machine has 4GB of RAM and is running 2.6.11.5 kernel. I have tried to specify vmalloc=256m to start with, but no luck - the machine does not even want to boot. It panics with: EXT2-fs: unable to read superblock isofs_fill_super: bread failed, dev=md0, iso_blknum=16, block=32 XFS: SB read failed VFS: Cannot open root device "md0" or unknown-block(9,0) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown- block(9,0) If I remove the "vmalloc" parameter, it boots just fine but then after some hours, when the load on the server goes up, I get the above "request" to increase vmalloc. Being desperate to find the way out, I have also tried increasing the hardcoded value in arch/i386/mm/init.c, but ended up with the same effect as with the parameter - panic on boot. /proc/meminfo says (while the system is up and running): MemTotal: 4073244 kB MemFree: 144356 kB Buffers: 1184 kB Cached: 2735576 kB SwapCached: 0 kB Active: 921804 kB Inactive: 2408800 kB HighTotal: 3193792 kB HighFree: 896 kB LowTotal: 879452 kB LowFree: 143460 kB SwapTotal: 7341600 kB SwapFree: 7341600 kB Dirty: 50940 kB Writeback: 0 kB Mapped: 613172 kB Slab: 498936 kB CommitLimit: 9378220 kB Committed_AS: 736392 kB PageTables: 1760 kB VmallocTotal: 114680 kB VmallocUsed: 88996 kB VmallocChunk: 20988 kB HugePages_Total: 0 HugePages_Free: 0 Hugepagesize: 4096 kB I have also tried changing the following parameters - but no luck either: vm.lower_zone_protection = 900 vm.min_free_kbytes = 30000 vm.vfs_cache_pressure = 150 Please help! What am I doing wrong? Also, if this question does not belong here - please point to the right direction :). Best regards, Ranko - 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/
