--- Andrew Morton <[email protected]> wrote:
> Could you send the test app please? (Apologies if you've already done so
> and I missed it).
Here is an strace from a reduced test:
open("/mnt/bar", O_RDWR|O_CREAT|O_DIRECT|O_LARGEFILE, 0644) = 3
pwrite(3, "\0", 1, 4292870144) = 1
mmap2(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0xffc00) = 0xb7ace000
pwrite(3, "\0", 1, 4294967296) = 1
munmap(0xb7ace000, 2097152) = 0
mmap2(0xb7ace000, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0xffe00) = 0xb7ace000
pwrite(3, "\0", 1, 4297064448) = 1
munmap(0xb7ace000, 2097152) = 0
mmap2(0xb7ace000, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0x100000) = 0xb7ace000
pwrite(3, "\0", 1, 4299161600) = 1
munmap(0xb7ace000, 2097152) = 0
mmap2(0xb7ace000, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0x100200) = 0xb7ace000
pwrite(3, "\0", 1, 4301258752
The final pwrite never returns.
This is with 2.6.15-rc1 + Trond's NFS patch (-mm2 would die on strace).
The only change from the previous test is that this one uses munmap/mmap64 instead of
remap_file_pages.
showPc shows:
SysRq : Show Regs
Pid: 4271, comm: writetest
EIP: 0060:[<c029cd2b>] CPU: 0
EIP is at prio_tree_first+0x26/0xb8
EFLAGS: 00000292 Tainted: P (2.6.15-rc1)
EAX: 00000000 EBX: f6765d94 ECX: f6765d94 EDX: 00000200
ESI: 00000000 EDI: f5da475c EBP: f6765db4 DS: 007b ES: 007b
CR0: 8005003b CR2: b7590000 CR3: 36b5d000 CR4: 000006d0
[<c029ce5e>] prio_tree_next+0xa1/0xa3
[<c014822a>] vma_prio_tree_next+0x27/0x51
[<c014b1dc>] unmap_mapping_range+0x18b/0x210
[<c0120d06>] __do_softirq+0x6a/0xd1
[<c0103a24>] apic_timer_interrupt+0x1c/0x24
[<c0146577>] invalidate_inode_pages2_range+0x215/0x24c
[<c01465cd>] invalidate_inode_pages2+0x1f/0x26
[<c01e4031>] nfs_file_direct_write+0x1e1/0x21a
[<c0159ea4>] do_sync_write+0xc7/0x10d
[<c012ff32>] autoremove_wake_function+0x0/0x57
[<c0159f92>] vfs_write+0xa8/0x177
[<c015a275>] sys_pwrite64+0x88/0x8c
[<c0102f51>] syscall_call+0x7/0xb
-Kenny
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