On Fri, Mar 19 2010, Shaohua Li wrote:
> On Fri, Mar 19, 2010 at 04:22:11PM +0800, Jens Axboe wrote:
> > On Fri, Mar 19 2010, Shaohua Li wrote:
> > > On Fri, Mar 19, 2010 at 08:59:48AM +0800, Shaohua Li wrote:
> > > > On Thu, Mar 18, 2010 at 08:53:13PM +0800, Chris Mason wrote:
> > > > > On Thu, Ma
On Fri, Mar 19, 2010 at 04:22:11PM +0800, Jens Axboe wrote:
> On Fri, Mar 19 2010, Shaohua Li wrote:
> > On Fri, Mar 19, 2010 at 08:59:48AM +0800, Shaohua Li wrote:
> > > On Thu, Mar 18, 2010 at 08:53:13PM +0800, Chris Mason wrote:
> > > > On Thu, Mar 18, 2010 at 09:42:57AM +0800, Shaohua Li wrote:
On Fri, Mar 19 2010, Shaohua Li wrote:
> On Fri, Mar 19, 2010 at 08:59:48AM +0800, Shaohua Li wrote:
> > On Thu, Mar 18, 2010 at 08:53:13PM +0800, Chris Mason wrote:
> > > On Thu, Mar 18, 2010 at 09:42:57AM +0800, Shaohua Li wrote:
> > > > Btrfs uses below equation to calculate ra_pages:
> > > >
On Fri, Mar 19, 2010 at 08:59:48AM +0800, Shaohua Li wrote:
> On Thu, Mar 18, 2010 at 08:53:13PM +0800, Chris Mason wrote:
> > On Thu, Mar 18, 2010 at 09:42:57AM +0800, Shaohua Li wrote:
> > > Btrfs uses below equation to calculate ra_pages:
> > > fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages
On Thu, Mar 18, 2010 at 08:53:13PM +0800, Chris Mason wrote:
> On Thu, Mar 18, 2010 at 09:42:57AM +0800, Shaohua Li wrote:
> > Btrfs uses below equation to calculate ra_pages:
> > fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages,
> > 4 * 1024 * 1024 / PAGE_CACHE_SIZ
On Thu, Mar 18, 2010 at 09:42:57AM +0800, Shaohua Li wrote:
> Btrfs uses below equation to calculate ra_pages:
> fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages,
> 4 * 1024 * 1024 / PAGE_CACHE_SIZE);
> is the max() a typo of min()? This makes the readahead size
Btrfs uses below equation to calculate ra_pages:
fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages,
4 * 1024 * 1024 / PAGE_CACHE_SIZE);
is the max() a typo of min()? This makes the readahead size is 4M by default,
which is too big.
I have a system with 16 CPU, 6G mem