From: Oleg Nesterov <oleg@tv-sign.ru>
To: linux-kernel@vger.kernel.org
Cc: Ram Pai <linuxram@us.ibm.com>,
Steven Pratt <slpratt@austin.ibm.com>,
Andrew Morton <akpm@osdl.org>
Subject: [PATCH 1/4] readahead: unneeded prev_page assignments
Date: Sat, 29 Jan 2005 14:10:37 +0300 [thread overview]
Message-ID: <41FB6F2D.909B216C@tv-sign.ru> (raw)
There is no point in setting ra->prev_page before 'goto out',
it will be overwritten anyway.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
--- 2.6.11-rc2/mm/readahead.c~ Wed Jan 12 11:44:55 2005
+++ 2.6.11-rc2/mm/readahead.c Mon Jan 24 20:19:38 2005
@@ -432,7 +432,6 @@ page_cache_readahead(struct address_spac
if (newsize == 0 || (ra->flags & RA_FLAG_INCACHE)) {
newsize = 1;
- ra->prev_page = offset;
goto out; /* No readahead or file already in cache */
}
/*
@@ -443,7 +442,6 @@ page_cache_readahead(struct address_spac
if ((ra->size == 0 && offset == 0) /* first io and start of file */
|| (ra->size == -1 && ra->prev_page == offset - 1)) {
/* First sequential */
- ra->prev_page = offset + newsize - 1;
ra->size = get_init_ra_size(newsize, max);
ra->start = offset;
if (!blockable_page_cache_readahead(mapping, filp, offset,
@@ -475,7 +473,6 @@ page_cache_readahead(struct address_spac
*/
if ((offset != (ra->prev_page+1) || (ra->size == 0))) {
ra_off(ra);
- ra->prev_page = offset + newsize - 1;
blockable_page_cache_readahead(mapping, filp, offset,
newsize, ra, 1);
goto out;
@@ -545,7 +542,7 @@ page_cache_readahead(struct address_spac
out:
ra->prev_page = offset + newsize - 1;
- return(newsize);
+ return newsize;
}
/*
reply other threads:[~2005-01-29 10:06 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=41FB6F2D.909B216C@tv-sign.ru \
--to=oleg@tv-sign.ru \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxram@us.ibm.com \
--cc=slpratt@austin.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).