Re: [RFC][PATCH] zram: drop partial_io support

From	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [RFC][PATCH] zram: drop partial_io support
Date	2015-12-16 02:30 +0100
Message-ID	<qG94J-3zE-1@gated-at.bofh.it> (permalink)
References	<qFAJH-6cU-1@gated-at.bofh.it> <qG8Lo-3t6-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Hello Minchan,

On (12/16/15 10:01), Minchan Kim wrote:
> Hello Sergey,
> 
> Sorry for the late response. I am in long vavacation now but today,
> I get small time to sit down on computer. :)

Have a good one!

> On Mon, Dec 14, 2015 at 09:38:55PM +0900, Sergey Senozhatsky wrote:
> > Hello,
> > 
> > I've been thinking about this for some time, but didn't have a chance
> > to properly investigate so far. My question is: why do we even bother
> > with partial IO in zram?
> 
> It was done before I involved zram actively so I should spend a time
> to search the reason.

Thanks a lot! I appreciate this. I was about to do the same but still
a bit too busy.

> Firstly, author was Jerome.
> http://lists.openwall.net/linux-kernel/2011/06/10/318
> 
> And Nitin wanted to increase logical block size 64K instead of
> making complex part by partial I/O.
> http://lists.openwall.net/linux-kernel/2011/06/10/402
> 
> And Jeff and Martin said there is no problem to increase
> logical_block_size from unsigned short if people are aware of
> the implications bigger blocks have on the filesystems they put on top.
> 
> http://lists.openwall.net/linux-kernel/2011/06/14/289
> http://lists.openwall.net/linux-kernel/2011/06/14/324
> 
> Jerome finally found severe problem which FAT fs are unable to
> cope with 64K logical blocks at least.
> http://lists.openwall.net/linux-kernel/2011/07/01/196
>
> That's why Nitin decided to suppport partial IO in zram.
> And I think it does make sense.

uhhh... ok, I see. Thanks.

	-ss
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[RFC][PATCH] zram: drop partial_io support Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2015-12-14 13:50 +0100
  Re: [RFC][PATCH] zram: drop partial_io support Minchan Kim <minchan@kernel.org> - 2015-12-16 02:10 +0100
    Re: [RFC][PATCH] zram: drop partial_io support Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2015-12-16 02:30 +0100

csiph-web