linux-kernel - Re: [PATCH v3 2/2] fadvise: implement POSIX_FADV

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Date:	Mon, 27 Jun 2011 09:05:52 +0200
From:	Andrea Righi <andrea@...terlinux.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Jerry James <jamesjer@...terlinux.com>,
	Marcus Sorensen <marcus@...ehost.com>,
	Matt Heaton <matt@...ehost.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Theodore Tso <tytso@....edu>,
	Shaohua Li <shaohua.li@...el.com>,
	Pádraig Brady <P@...igBrady.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] fadvise: implement POSIX_FADV_NOREUSE

On Sun, Jun 26, 2011 at 06:47:37PM -0400, Rik van Riel wrote:
> On 06/24/2011 09:49 AM, Andrea Righi wrote:
> 
> >@@ -114,7 +114,8 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
> >  			ret = 0;
> >  		break;
> >  	case POSIX_FADV_NOREUSE:
> >-		break;
> >+		/* Reduce cache eligibility */
> >+		force = false;
> >  	case POSIX_FADV_DONTNEED:
> >  		if (!bdi_write_congested(mapping->backing_dev_info))
> >  			filemap_flush(mapping);
> 
> And the same is true here.  "force" is just not a very
> descriptive name.

OK, I'll change the name to "invalidate" in the next version of the
patch.

Thanks,
-Andrea

> 
> >@@ -124,8 +125,8 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
> >  		end_index = (endbyte>>  PAGE_CACHE_SHIFT);
> >
> >  		if (end_index>= start_index)
> >-			invalidate_mapping_pages(mapping, start_index,
> >-						end_index);
> >+			__invalidate_mapping_pages(mapping, start_index,
> >+						end_index, force);
> >  		break;
> >  	default:
> >  		ret = -EINVAL;
> 
> 
> -- 
> All rights reversed
--
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