KOSAKI Motohiro writes:
>> Instead of reverting and renaming --discard, what about making it accept an
>> optional argument, so we could use --discard (to enable all thing and keep
>> backward compatibility); --discard=cluster & --discard=batch (or whatever we
>> think it should be named). I'll t
> Instead of reverting and renaming --discard, what about making it accept an
> optional argument, so we could use --discard (to enable all thing and keep
> backward compatibility); --discard=cluster & --discard=batch (or whatever we
> think it should be named). I'll try to sort this approach out i
Karel, Motohiro,
Thanks a lot for your time reviewing this patch and providing me with valuable
feedback.
On Tue, May 21, 2013 at 04:17:04PM -0400, KOSAKI Motohiro wrote:
> (5/21/13 6:26 AM), Karel Zak wrote:
> > On Mon, May 20, 2013 at 09:02:43PM -0400, KOSAKI Motohiro wrote:
> >>> - if (fl_disc
(5/21/13 6:26 AM), Karel Zak wrote:
> On Mon, May 20, 2013 at 09:02:43PM -0400, KOSAKI Motohiro wrote:
>>> - if (fl_discard)
>>> + if (fl_discard) {
>>> flags |= SWAP_FLAG_DISCARD;
>>> + if (fl_discard > 1)
>>> + flags |= SWAP_FLAG_DISCARD_CLUSTER;
>>
>>
On Mon, May 20, 2013 at 09:02:43PM -0400, KOSAKI Motohiro wrote:
> > - if (fl_discard)
> > + if (fl_discard) {
> > flags |= SWAP_FLAG_DISCARD;
> > + if (fl_discard > 1)
> > + flags |= SWAP_FLAG_DISCARD_CLUSTER;
>
> This is not enough, IMHO. When running
On Mon, May 20, 2013 at 09:04:25PM -0300, Rafael Aquini wrote:
> - while ((c = getopt_long(argc, argv, "ahdefp:svVL:U:",
> + while ((c = getopt_long(argc, argv, "ahcdefp:svVL:U:",
> long_opts, NULL)) != -1) {
> switch (c) {
> case 'a
> +.B "\-c, \-\-cluster\-discard"
> +Swapping will discard clusters of swap pages in between freeing them
> +and re-writing to them, if the swap device supports that. This option
> +also implies the
> +.I \-d, \-\-discard
> +swapon flag.
I'm not sure this is good idea. Why can't we make these flag
Introduce a new swapon flag/option to support more flexible swap discard setup.
The --cluster-discard swapon(8) option can be used by a system admin to flag
sys_swapon() to perform page-cluster fine-grained discards.
This patch also changes the behaviour of swapon(8) --discard option, that now
wil
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