On Thu, Nov 22, 2018 at 03:59:26PM +0900, Sergey Senozhatsky wrote:
> On (11/22/18 15:31), Minchan Kim wrote:
> > >
> > > I got what you mean now. Let's call it as "incompressible page wrieback"
> > > to prevent confusing.
> > >
> > > "incompressible page writeback" would be orthgonal feature. Th
On (11/22/18 15:31), Minchan Kim wrote:
> >
> > I got what you mean now. Let's call it as "incompressible page wrieback"
> > to prevent confusing.
> >
> > "incompressible page writeback" would be orthgonal feature. The goal is
> > "let's save memory at the cost of *latency*". If the page is swapp
On Thu, Nov 22, 2018 at 03:15:42PM +0900, Minchan Kim wrote:
> On Thu, Nov 22, 2018 at 02:40:40PM +0900, Sergey Senozhatsky wrote:
> > On (11/22/18 14:04), Minchan Kim wrote:
> > >
> > > > additionally, it's too simple. It writes-back pages which can be
> > > > swapped in immediately; which basica
On Thu, Nov 22, 2018 at 02:40:40PM +0900, Sergey Senozhatsky wrote:
> On (11/22/18 14:04), Minchan Kim wrote:
> >
> > > additionally, it's too simple. It writes-back pages which can be
> > > swapped in immediately; which basically means that we do pointless
> > > PAGE_SIZE writes to a device which
On (11/22/18 14:04), Minchan Kim wrote:
>
> > additionally, it's too simple. It writes-back pages which can be
> > swapped in immediately; which basically means that we do pointless
> > PAGE_SIZE writes to a device which doesn't really like pointless
> > writes.
>
> This patchset aims for *IDLE p
On Thu, Nov 22, 2018 at 11:14:43AM +0900, Sergey Senozhatsky wrote:
> On (11/21/18 05:34), Minchan Kim wrote:
> > >
> > > Just a thought,
> > >
> > > I wonder if it will make sense (and if it will be possible) to writeback
> > > idle _compressed_ objects. Right now we decompress, say, a perfectly
On (11/21/18 05:34), Minchan Kim wrote:
> >
> > Just a thought,
> >
> > I wonder if it will make sense (and if it will be possible) to writeback
> > idle _compressed_ objects. Right now we decompress, say, a perfectly
> > fine 400-byte compressed object to a PAGE_SIZE-d object and then push
> > i
On Wed, Nov 21, 2018 at 01:55:51PM +0900, Sergey Senozhatsky wrote:
> On (11/16/18 16:20), Minchan Kim wrote:
> > + zram_set_flag(zram, index, ZRAM_UNDER_WB);
> > + zram_slot_unlock(zram, index);
> > + if (zram_bvec_read(zram, &bvec, index, 0, NULL)) {
> > +
On (11/16/18 16:20), Minchan Kim wrote:
> + zram_set_flag(zram, index, ZRAM_UNDER_WB);
> + zram_slot_unlock(zram, index);
> + if (zram_bvec_read(zram, &bvec, index, 0, NULL)) {
> + zram_slot_lock(zram, index);
> + zram_clea
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