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SubjectRe: X much slower in 2.0.24 than in 1.2.13
I had to make the same change as Nuno (0xc0100000 to 0x00100000; I guess
Linus is fully in 2.1.x mode now).

My profile of 2.0.24 done with ">/proc/profile; x11perf -all;
readprofile" letting x11perf run for about 1/2 hour came out like this:

do_no_page
00119010 1
00119014 0
00119018 0
0011901c 0
00119020 0
00119024 0
00119028 0
0011902c 0
00119030 0
00119034 0
00119038 0
0011903c 0
00119040 0
00119044 0
00119048 1
0011904c 0
00119050 0
00119054 0
00119058 0
0011905c 0
00119060 0
00119064 0
00119068 0
0011906c 0
00119070 0
00119074 0
00119078 0
0011907c 0
00119080 0
00119084 0
00119088 0
0011908c 0
00119090 3
00119094 0
00119098 0
0011909c 0
001190a0 0
001190a4 0
001190a8 0
001190ac 0
001190b0 0
001190b4 0
001190b8 0
001190bc 0
001190c0 0
001190c4 0
001190c8 1
001190cc 0
001190d0 0
001190d4 0
001190d8 0
001190dc 0
001190e0 0
001190e4 0
001190e8 0
001190ec 0
001190f0 0
001190f4 0
001190f8 0
001190fc 0
00119100 0
00119104 0
00119108 0
0011910c 1
00119110 0
00119114 0
00119118 0
0011911c 0
00119120 0
00119124 0
00119128 0
0011912c 0
00119130 0
00119134 0
00119138 0
0011913c 0
00119140 0
00119144 0
00119148 0
0011914c 0
00119150 0
00119154 0
00119158 0
0011915c 0
00119160 0
00119164 0
00119168 0
0011916c 0
00119170 1
00119174 0
00119178 0
0011917c 0
00119180 0
00119184 0
00119188 0
0011918c 0
00119190 0
00119194 0
00119198 1
0011919c 0
001191a0 0
001191a4 0
001191a8 0
001191ac 0
001191b0 0
001191b4 0
001191b8 0
001191bc 0
001191c0 0
001191c4 0
001191c8 0
001191cc 0
001191d0 0
001191d4 0
001191d8 0
001191dc 0
001191e0 0
001191e4 0
001191e8 0
001191ec 0
001191f0 0
001191f4 0
001191f8 27
001191fc 0
00119200 0
00119204 0
00119208 0
0011920c 0
00119210 0
00119214 0
00119218 0
0011921c 0
00119220 0
00119224 0
00119228 0
0011922c 0
00119230 0
00119234 0
00119238 0
0011923c 0
00119240 0
00119244 0
00119248 0
0011924c 0
00119250 0
00119254 0
00119258 0
0011925c 0
00119260 0
00119264 0
00119268 0
0011926c 0
00119270 0
00119274 0
00119278 0
0011927c 0
00119280 0
00119284 0
00119288 0
0011928c 0
00119290 0
00119294 0
00119298 0
0011929c 0
001192a0 0
001192a4 0
001192a8 0
001192ac 0
001192b0 0
001192b4 0
001192b8 0
001192bc 0
001192c0 0
001192c4 0
001192c8 0
001192cc 0
001192d0 0
001192d4 0
001192d8 0
001192dc 0
001192e0 0
001192e4 0
001192e8 0
001192ec 0
001192f0 0
001192f4 0
001192f8 0
001192fc 0
00119300 0
00119304 0
00119308 0
0011930c 0
00119310 0
00119314 0
00119318 0
0011931c 0
00119320 0
00119324 0
00119328 0
0011932c 0
00119330 0
00119334 0
00119338 0
0011933c 0
00119340 0
00119344 0
00119348 0
0011934c 0
00119350 0
00119354 0
00119358 0
0011935c 0
00119360 0
00119364 0
00119368 0
0011936c 0
1 0.00% 00110850 wake_up
1 0.00% 00110c60 del_timer
1 0.00% 00111e20 get_pid
1 0.00% 00113dc0 sys_newuname
1 0.00% 00114680 send_sig
1 0.00% 001188c0 put_page
1 0.00% 001188f0 put_dirty_page
1 0.00% 001199f0 get_unmapped_area
1 0.00% 00119a90 unmap_fixup
1 0.00% 0011a470 exit_mmap
1 0.00% 0011c720 mprotect_fixup
1 0.00% 00121920 sys_open
1 0.00% 00124a80 refile_buffer
1 0.00% 00124f30 _brelse
1 0.00% 00125360 create_buffers
1 0.00% 00126830 try_to_generate_cluster
1 0.00% 001286a0 copy_mount_options
1 0.00% 00129ac0 cp_new_stat
1 0.00% 0012aa10 search_binary_handler
1 0.00% 0012b8c0 lookup
1 0.00% 0012f800 dcache_add
1 0.00% 00130190 load_elf_binary
1 0.00% 00138880 sys_socketcall
1 0.00% 0013be80 def_callback2
1 0.00% 0013c130 unix_find_other
1 0.00% 0013d5e0 unix_ioctl
1 0.00% 001426c0 ip_send_room
1 0.00% 00145210 tcp_recvmsg
1 0.00% 00147bc0 tcp_rcv
1 0.00% 00148710 tcp_dequeue_partial
1 0.00% 001502d0 get_group_desc
1 0.00% 00150840 ext2_new_block
1 0.00% 00152080 ext2_release_file
1 0.00% 00153650 inode_getblk
1 0.00% 001543a0 ext2_update_inode
1 0.00% 001548f0 ext2_find_entry
1 0.00% 00163070 ll_rw_block
1 0.00% 001707b0 init_dev
1 0.00% 00172080 initialize_tty_struct
1 0.00% 00173660 n_tty_receive_room
1 0.00% 001799b0 pty_open
1 0.00% 0017ccf0 SHATransform
1 0.00% 00182410 set_palette
1 0.00% 00182800 get_scrmem
1 0.00% 001844b0 startup
1 0.00% 001a8420 gus_wave_detect
1 0.00% 001abde0 set_volumes
2 0.00% 0010a980 error_code
2 0.00% 00112b90 printk
2 0.00% 00117bd0 clear_page_tables
2 0.00% 00117d70 new_page_tables
2 0.00% 00119680 do_mmap
2 0.00% 00119ca0 do_munmap
2 0.00% 0011a520 insert_vm_struct
2 0.00% 0011b520 _wait_on_page
2 0.00% 00121890 get_unused_fd
2 0.00% 00121a70 sys_close
2 0.00% 00122320 sys_readv
2 0.00% 001237a0 get_empty_filp
2 0.00% 00129c50 sys_newstat
2 0.00% 00129f60 open_inode
2 0.00% 0012a130 copy_strings
2 0.00% 0012a450 read_exec
2 0.00% 0012b5c0 getname
2 0.00% 0012b740 permission
2 0.00% 0012ba40 dir_namei
2 0.00% 0012fad0 create_elf_tables
2 0.00% 001514d0 ext2_check_dir_entry
2 0.00% 00154880 ext2_match
2 0.00% 00154bf0 ext2_lookup
2 0.00% 001629c0 add_request
2 0.00% 00173a70 read_chan
2 0.00% 001741d0 write_chan
2 0.00% 00175050 csi_J
2 0.00% 00182550 set_cursor
2 0.00% 0018f800 scsi_init_malloc
2 0.00% 001b1cd0 csum_partial_copy_fromuser
3 0.00% 001157e0 sys_sigaction
3 0.00% 00120380 sys_swapon
3 0.00% 00122b60 iput
3 0.00% 00125400 brw_page
3 0.00% 0013beb0 def_callback3
3 0.00% 00143fc0 tcp_find_established
3 0.00% 001511d0 ext2_check_blocks_bitmap
3 0.00% 00151460 ext2_count_free
3 0.00% 00151be0 ext2_file_write
3 0.00% 001533d0 ext2_bmap
3 0.00% 00154040 ext2_read_inode
3 0.00% 00160a60 read_profile
3 0.00% 00173970 n_tty_open
3 0.00% 001768b0 con_write
4 0.00% 0011a8c0 merge_segments
4 0.00% 001521a0 sync_iblock
4 0.00% 001720f0 tty_default_put_char
5 0.00% 00111e80 do_fork
5 0.00% 00117e20 copy_page_range
5 0.00% 001181e0 zap_page_range
5 0.00% 00124570 getblk
5 0.00% 0012fa90 padzero
5 0.00% 00137460 sock_wake_async
5 0.00% 00179760 pty_write
6 0.01% 0010ab10 page_fault
6 0.01% 00110160 do_page_fault
6 0.01% 00117ca0 free_page_tables
6 0.01% 00122f70 _iget
6 0.01% 00162c00 make_request
6 0.01% 00172480 opost
7 0.01% 001394e0 _release_sock
7 0.01% 001520a0 sync_block
7 0.01% 00172a80 n_tty_receive_buf
7 0.01% 00196970 BusLogic_HardResetHostAdapter
7 0.01% 001a7340 gus_poke
7 0.01% 001a73c0 gus_peek
8 0.01% 00110c20 add_timer
8 0.01% 00139840 kfree_skbmem
8 0.01% 00170160 tty_hung_up_p
9 0.01% 0012f680 dcache_lookup
10 0.01% 00115ee0 sys_gettimeofday
10 0.01% 0014fae0 inet_select
10 0.01% 00152270 sync_indirect
12 0.02% 0011b5e0 generic_file_read
13 0.02% 00137210 sock_write
14 0.02% 00162790 unplug_device
15 0.02% 00110950 wake_up_interruptible
15 0.02% 001396f0 alloc_skb
16 0.02% 00121e20 sys_read
18 0.03% 00123950 sync_buffers
18 0.03% 00144390 tcp_listen_select
18 0.03% 00171410 tty_select
22 0.03% 00185990 check_wild_interrupts
24 0.04% 0011d660 kmalloc
24 0.04% 00144430 tcp_select
26 0.04% 00121ed0 sys_write
27 0.04% 0011bbd0 filemap_nopage
29 0.04% 00123ce0 get_hash_table
30 0.05% 0010f250 do_gettimeofday
32 0.05% 001395e0 kfree_skb
35 0.06% 00137140 sock_read
36 0.06% 00119010 do_no_page
39 0.06% 00174380 normal_select
40 0.06% 0010cf10 probe_irq_on
43 0.07% 00118a70 do_wp_page
46 0.07% 00110580 schedule
60 0.10% 0016e560 delay_50ms
71 0.12% 0011d880 kfree
181 0.31% 00196470 BusLogic_Command
199 0.34% 00197d10 BusLogic_TargetDeviceInquiry
361 0.62% 0013cac0 unix_fd_free
390 0.67% 00139da0 memcpy_fromiovec
694 1.19% 0012e000 _set_fd_set
748 1.28% 0013d0c0 unix_recvmsg
852 1.46% 0010f8c0 old_select
1002 1.72% 0013d5c0 unix_select
1073 1.84% 00122390 sys_writev
1078 1.85% 0012dc60 free_wait
1237 2.13% 001391e0 sock_wmalloc
1250 2.15% 0012dcb0 check
1436 2.47% 00137300 sock_select
1497 2.57% 00122020 sock_readv_writev
1682 2.89% 00139380 sock_alloc_send_skb
1929 3.32% 0012df90 _get_fd_set
2486 4.28% 0011f220 free_pages
2669 4.59% 0011f330 _get_free_pages
2761 4.75% 0010a860 ret_from_sys_call
2955 5.09% 00122100 do_readv_writev
3199 5.51% 0013cc50 unix_sendmsg
3374 5.81% 0012e030 sys_select
4065 7.00% 0010a7e0 system_call
5303 9.13% 0013a060 datagram_select
6176 10.63% 0012dd40 do_select
8391 14.45% 00118d00 verify_area
58048 100.00% 00000000 total

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