Re: [-mm] BUG: sleeping function called from invalid context at include/linux/pagemap.h:290

Li Zefan
2008-07-04T06:12:54Z

> Li-san, Could you try to below patch on your environment?
>

I've tested it, so UNEVICTABLE_LRU is disabled and the bug disapeared.

>
> ----------------------
> pagewalk use pte_offset_map().
> pte_offset_map() use kmap_atomic().
> __munlock_pte_handler() use lock_page().
>
> So, in CONFIG_HIGHPTE=y, following error happend.
>
>
> BUG: sleeping function called from invalid context at include/linux/pagemap.h:290
> in_atomic():1, irqs_disabled():0
> no locks held by gpg-agent/2134.
> Pid: 2134, comm: gpg-agent Not tainted 2.6.26-rc8-mm1 #11
> [<c0421d38>] __might_sleep+0xbe/0xc5
> [<c04770a2>] __munlock_pte_handler+0x3c/0x9e
> [<c047c11f>] walk_page_range+0x15b/0x1b4
> [<c0477048>] __munlock_vma_pages_range+0x4e/0x5b
> [<c0476f0c>] ? __munlock_pmd_handler+0x0/0x10
> [<c0477066>] ? __munlock_pte_handler+0x0/0x9e
> [<c0477064>] munlock_vma_pages_range+0xf/0x11
> [<c0477dcb>] exit_mmap+0x32/0xf2
> [<c042ac12>] ? exit_mm+0xc7/0xda
> [<c042732a>] mmput+0x3a/0x8b
> [<c042ac20>] exit_mm+0xd5/0xda
> [<c042bf6a>] do_exit+0x1fb/0x5d5
> [<c045c4df>] ? audit_syscall_exit+0x2aa/0x2c5
> [<c042c3a3>] do_group_exit+0x5f/0x88
> [<c042c3db>] sys_exit_group+0xf/0x11
> [<c0403956>] syscall_call+0x7/0xb
>
> then, this feature should be disabled on 32BIT until fixed above problem.
>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
>
> ---
> mm/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> Index: b/mm/Kconfig
> ===================================================================
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -216,6 +216,7 @@ config PAGE_WALKER
> config UNEVICTABLE_LRU
> bool "Add LRU list to track non-evictable pages"
> default y
> + depends on 64BIT
> select PAGE_WALKER
> help
> Keeps unevictable pages off of the active and inactive pageout