I will fix and resend tomorrow.
Huge thanks, Sergey!
On Tue, Apr 10, 2018 at 09:41:09AM +0900, Sergey Senozhatsky wrote:
> I think zram_debugfs_unregister() is called both from zram_remove() and
> from destroy_devices(), which explodes:
>
> [ 1906.467981] BUG: unable to handle kernel NULL pointer
On Tue, Apr 10, 2018 at 09:03:05AM +0900, Sergey Senozhatsky wrote:
> Hi Minchan,
>
> On (04/09/18 14:54), Minchan Kim wrote:
> > +static long long ns2usecs(u64 nsec)
> > +{
> > + nsec += 500;
> > + do_div(nsec, 1000);
> > + return nsec;
> > +}
>
> Sorry, I don't quite understand "nsec += 5
I think zram_debugfs_unregister() is called both from zram_remove() and
from destroy_devices(), which explodes:
[ 1906.467981] BUG: unable to handle kernel NULL pointer dereference at
00b8
[ 1906.468007] PGD 8003d5050067 P4D 8003d5050067 PUD 3fa97d067 PMD 0
[ 1906.468029] Oops
Hi Minchan,
On (04/09/18 14:54), Minchan Kim wrote:
> +static long long ns2usecs(u64 nsec)
> +{
> + nsec += 500;
> + do_div(nsec, 1000);
> + return nsec;
> +}
Sorry, I don't quite understand "nsec += 500".
> +static ssize_t read_block_state(struct file *file, char __user *buf,
> +
On Mon, 9 Apr 2018 10:03:45 +0200
Greg KH wrote:
> On Mon, Apr 09, 2018 at 02:54:35PM +0900, Minchan Kim wrote:
> > zRam as swap is useful for small memory device. However, swap means
> > those pages on zram are mostly cold pages due to VM's LRU algorithm.
> > Especially, once init data for appli
On Mon, Apr 09, 2018 at 02:54:35PM +0900, Minchan Kim wrote:
> zRam as swap is useful for small memory device. However, swap means
> those pages on zram are mostly cold pages due to VM's LRU algorithm.
> Especially, once init data for application are touched for launching,
> they tend to be not acc
zRam as swap is useful for small memory device. However, swap means
those pages on zram are mostly cold pages due to VM's LRU algorithm.
Especially, once init data for application are touched for launching,
they tend to be not accessed any more and finally swapped out.
zRAM can store such cold page
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