From: Eric Sandeen <sandeen@sandeen.net>
To: xfs mailing list <xfs@oss.sgi.com>
Subject: Mystery solved? files not written for days...
Date: Mon, 30 Mar 2009 17:01:04 -0500 [thread overview]
Message-ID: <49D14120.8040804@sandeen.net> (raw)
On LKML:
[PATCH] writeback: guard against jiffies wraparound on
inode->dirtied_when checks
When a file is continually dirtied, the check in sync_sb_inodes:
/* Was this inode dirtied after sync_sb_inodes was called? */
if (time_after(inode->dirtied_when, start))
break;
may have large windows where this trips on the first
(continually-dirtied) inode on the list when the time_after check has
wrapped, causing the nothing to be written out for that superblock,
potentially for days.
Could this be the reason for those various "hey, my file disappeared
after a crash and I hadn't written to it for *days*" reports we got now
and then, leaving us all scratching our heads?
-Eric
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next reply other threads:[~2009-03-30 22:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-30 22:01 Eric Sandeen [this message]
2009-03-30 22:30 ` Mystery solved? files not written for days Felix Blyakher
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=49D14120.8040804@sandeen.net \
--to=sandeen@sandeen.net \
--cc=xfs@oss.sgi.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.