On 09/30/2013 09:31 AM, David Miller wrote:
This is a respin of the original page_offset and 64-bit page
table changes with some minor changes and a bug fix:
1) Bob's ACKs for the first 6 patches added.
2) Don't use "UL" postfix for shift counts, there is code that
wants those to be "int", particularly printfs in mm/mm_init.c
that use the "%d" format specifier for SECTIONS_SHIFT.
3) Adjust VA_HOLE defines to match what the new 3-level page
tables can actually provide.
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
--
Allocate 10 hugepages, and run a test using tool 'fio' with following
jobfile.
Fio just hangs. Basically issue is with O_DIRECT and hugepages. If you
comment
out "direct=1" from jobfile test works fine.
[global]
bs=8k
randrepeat=1
mem=shmhuge
size=100m
direct=1
[job2]
ioengine=psync
rw=randrw
filename=file1:file2
cat /proc/49667/stack
[<00000000004209d4>] tl0_irq14+0x14/0x20
[<0000000000570ffc>] hugetlb_fault+0xbc/0x360
[<000000000057135c>] follow_hugetlb_page+0xbc/0x300
[<000000000055526c>] __get_user_pages+0x2ec/0x3a0
[<00000000005553e4>] get_user_pages+0x44/0x60
[<0000000000457590>] get_user_pages_fast+0xf0/0x220
[<00000000005ca878>] do_direct_IO+0xed8/0x1c80
[<00000000005cbb44>] __blockdev_direct_IO+0x344/0x1640
[<0000000010320444>] ext4_ind_direct_IO+0xe4/0x440 [ext4]
[<00000000102dc888>] ext4_ext_direct_IO+0x1c8/0x2c0 [ext4]
[<00000000102dca7c>] ext4_direct_IO+0xfc/0x200 [ext4]
[<000000000052d4ac>] generic_file_aio_read+0x1ec/0x220
[<000000000058dd98>] do_sync_read+0x58/0xa0
[<000000000058f42c>] vfs_read+0x6c/0x140
[<000000000058f568>] SyS_pread64+0x68/0x80
[<00000000004061d4>] linux_sparc_syscall+0x34/0x44
[root@localhost ~]# cat /proc/49667/stack
[<0000000000538f58>] put_compound_page+0x38/0x1c0
[<000002eab77ca457>] 0x2eab77ca457
[root@localhost ~]# cat /proc/49667/stack
[<0000000000538f2c>] put_compound_page+0xc/0x1c0
[<000000000053912c>] put_page+0x4c/0x60
[<0000000000571124>] hugetlb_fault+0x1e4/0x360
[<000000000057135c>] follow_hugetlb_page+0xbc/0x300
[<000000000055526c>] __get_user_pages+0x2ec/0x3a0
[<00000000005553e4>] get_user_pages+0x44/0x60
[<0000000000457590>] get_user_pages_fast+0xf0/0x220
[<00000000005ca878>] do_direct_IO+0xed8/0x1c80
[<00000000005cbb44>] __blockdev_direct_IO+0x344/0x1640
[<0000000010320444>] ext4_ind_direct_IO+0xe4/0x440 [ext4]
[<00000000102dc888>] ext4_ext_direct_IO+0x1c8/0x2c0 [ext4]
[<00000000102dca7c>] ext4_direct_IO+0xfc/0x200 [ext4]
[<000000000052d4ac>] generic_file_aio_read+0x1ec/0x220
[<000000000058dd98>] do_sync_read+0x58/0xa0
[<000000000058f42c>] vfs_read+0x6c/0x140
[<000000000058f568>] SyS_pread64+0x68/0x80
[<00000000004061d4>] linux_sparc_syscall+0x34/0x44
thanks,
-Guru
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