On Jun 14, 2006, at 19:48, Alan Cox wrote:
alc 2006-06-14 17:48:46 UTC
FreeBSD src repository
Modified files:
sys/vm vm_map.c
Log:
Correct an error in the previous revision that could lead to a
panic:
Found mapped cache page. Specifically, if cnt.v_free_count dips
below
cnt.v_free_reserved after p_start has been set to a non-NULL value,
then vm_map_pmap_enter() would break out of the loop and incorrectly
call pmap_enter_object() for the remaining address range. To
correct
this error, this revision truncates the address range so that
pmap_enter_object() will not map any cache pages.
Hello Alan,
I am still getting "Found mapped cache page" panics with this
revision on
amd64
#10 0xffffffff802b5652 in panic (
fmt=0xffffffff80501330 "Found mapped cache page %p")
at /usr/src/sys/kern/kern_shutdown.c:549
bootopt = 256
newpanic = 18
ap = {{gp_offset = 16, fp_offset = 48,
overflow_arg_area = 0xffffffffa3f82920,
reg_save_area = 0xffffffffa3f82840}}
buf = "Found mapped cache page 0xffffff003ef9c520", '\0'
<repeats 213 times>
#11 0xffffffff804362ac in vm_page_select_cache (color=13)
at /usr/src/sys/vm/vm_page.c:765
object = 0x0
m = 0xffffff003ef9c520
was_trylocked = 13
#12 0xffffffff804363c9 in vm_page_alloc (object=0xffffff0002e01578,
pindex=8318, req=64) at /usr/src/sys/vm/vm_page.c:841
m = 0xffffff003c328700
color = 13
flags = 0
page_req = 0
#13 0xffffffff80428615 in vm_fault (map=0xffffff0009bbc760,
vaddr=34403745792, fault_type=2 '\002', fault_flags=8)
at /usr/src/sys/vm/vm_fault.c:453
retry_object = 0xffffffffa3f82c00
retry_pindex = 18446744072165534544
retry_prot = 0 '\0'
prot = 3 '\003'
is_first_object_locked = 163301216
result = 0
growstack = 1
wired = 0
map_generation = 723
next_object = 0x0
marray = {0xffffff00232cdac0, 0xffffff0009bbc760,
0xffffffffa3f82b50,
0xffffffff80431781, 0xffffffff00000000, 0x0, 0x0, 0xffffff0007442c00,
0xffffff00232cdac0, 0x0, 0x3, 0xffffff00284b0d20, 0xffffffffa3f82b50,
0x8029ed000, 0xffffff0006b91000, 0xffffff00232cdac0}
hardfault = 0
fs = {m = 0x0, object = 0xffffff0002e01578, pindex = 8318,
first_m = 0x0, first_object = 0xffffff0002e01578, first_pindex =
8318,
map = 0xffffff0009bbc760, entry = 0xffffff001a2ee460,
lookup_still_valid = 1, vp = 0x0}
regards
tilman
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