Hi Balbir,
The get_task_mm()/mmput(mm) usage is not correct.
With CONFIG_DEBUG_SPINLOCK_SLEEP=y :
BUG: sleeping function called from invalid context at kernel/fork.c:390
in_atomic():1, irqs_disabled():0
[<c0116620>] __might_sleep+0x97/0x9c
[<c0116a2e>] mmput+0x15/0x8b
[<c01582f6>] install_arg_page+0x72/0xa9
[<c01584b1>] setup_arg_pages+0x184/0x1a5
...
BUG: sleeping function called from invalid context at kernel/fork.c:390
in_atomic():1, irqs_disabled():0
[<c0116620>] __might_sleep+0x97/0x9c
[<c0116a2e>] mmput+0x15/0x8b
[<c01468ee>] do_no_page+0x255/0x2bd
[<c0146b8d>] __handle_mm_fault+0xed/0x1ef
[<c0111884>] do_page_fault+0x247/0x506
[<c011163d>] do_page_fault+0x0/0x506
[<c0348f99>] error_code+0x39/0x40
current->mm seems to be enough here.
In patch4, memctlr_dec_rss(page, mm) should be memctlr_dec_rss(page)
to compile correctly.
and in patch0 :
> 4. Disable cpuset's (to simply assignment of tasks to resource groups)
> cd /container
> echo 0 > cpuset_enabled
should be :
echo 0 > cpuacct_enabled
Note : cpuacct_enabled is 0 by default.
Now the big question : to implement guarantee, the LRU needs to know
if a page can be removed from memory or not.
Any ideas to do that without any change in the struct page ?
Patrick
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ Patrick Le Dot
mailto: [email protected]@bull.net Centre UNIX de BULL SAS
Phone : +33 4 76 29 73 20 1, Rue de Provence BP 208
Fax : +33 4 76 29 76 00 38130 ECHIROLLES Cedex FRANCE
Bull, Architect of an Open World TM
www.bull.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
