Re: [11/36] Use page_cache_xxx in fs/buffer.c

On Fri, 31 Aug 2007, Jens Axboe wrote:

> > Ok. So another solution maybe to limit the blocksizes that can be used 
> > with a device?
> 
> That'd work for creation, but not for moving things around.

What do you mean by moving things around? Creation binds a filesystem to a 
device.

> > Hmmmm.. We could keep the existing scheme too and check that device 
> > drivers split things up if they are too large? Isnt it possible today
> > to create a huge bio of 2M for huge pages and send it to a device?
> 
> Not sure, aren't the constituents of compound pages the basis for IO?

get_user_pages() serializes compound pages into the base pages. But doesnt 
the I/O layer coalesce these later into 2M chunks again?
-
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/

---

• Follow-Ups:
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Jens Axboe <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Jörn Engel <[email protected]>

• References:
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Christoph Lameter <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Christoph Lameter <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Jens Axboe <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Christoph Lameter <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Jens Axboe <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Christoph Lameter <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Jens Axboe <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Christoph Lameter <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Jens Axboe <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Christoph Lameter <[email protected]>
  • Re: [11/36] Use page_cache_xxx in fs/buffer.c
    • From: Jens Axboe <[email protected]>

• Prev by Date: Re: [PATCH] Increase lockdep MAX_LOCK_DEPTH
• Next by Date: memory barrier to ensure copy_to_user() completes
• Previous by thread: Re: [11/36] Use page_cache_xxx in fs/buffer.c
• Next by thread: Re: [11/36] Use page_cache_xxx in fs/buffer.c
• Index(es):
  • Date
  • Thread

[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]