Messages in this thread | | | From | Badari Pulavarty <> | Subject | mounting 4000 disks | Date | Thu, 3 Apr 2003 15:20:52 -0800 |
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Hi,
I have been playing with testing 4000 disk support. (using 32bit dev_t).
I created 4000 disks using scsi_debug and mounted them. We consumed 84MB of low memory by just mouting 4000 filesystems. Out of 84MB lowmem 48MB is in slabs. 33 MB is used by buffers.
Here are the slabs which used more than 1MB. 32MB is used by size-8192 slab. (super block ?)
Anything else interesting ? I guess i can try nobh mount option.
- Badari
ext2_inode_cache before:136 after:4136 diff:4000 size:480 incr:1920000 ext3_inode_cache before:2776 after:10808 diff:8032 size:504 incr:4048128 radix_tree_node before:932 after:5026 diff:4094 size:272 incr:1113568 inode_cache before:144258 after:148260 diff:4002 size:364 incr:1456728 dentry_cache before:148573 after:164611 diff:16038 size:172 incr:2758536 buffer_head before:9027 after:48970 diff:39943 size:64 incr:2556352 size-8192 before:9 after:4009 diff:4000 size:8192 incr:32768000 size-512 before:12375 after:16408 diff:4033 size:524 incr:2113292
Before: -------- MemTotal: 3883236 kB MemFree: 3452404 kB Buffers: 7012 kB Cached: 140668 kB SwapCached: 0 kB Active: 47564 kB Inactive: 107040 kB HighTotal: 3014616 kB HighFree: 2839104 kB LowTotal: 868620 kB LowFree: 613300 kB SwapTotal: 2040244 kB SwapFree: 2040244 kB Dirty: 92 kB Writeback: 0 kB Mapped: 14052 kB Slab: 236780 kB Committed_AS: 12132 kB PageTables: 352 kB ReverseMaps: 1679
After: ------ MemTotal: 3883236 kB MemFree: 3361564 kB Buffers: 40512 kB Cached: 147468 kB SwapCached: 0 kB Active: 49564 kB Inactive: 145560 kB HighTotal: 3014616 kB HighFree: 2832064 kB LowTotal: 868620 kB LowFree: 529500 kB SwapTotal: 2040244 kB SwapFree: 2040244 kB Dirty: 6252 kB Writeback: 0 kB Mapped: 14060 kB Slab: 286952 kB Committed_AS: 12136 kB PageTables: 352 kB ReverseMaps: 1681
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