From: "Theodore Ts'o" <tytso@mit.edu>
To: Qu Wenruo <quwenruo@cn.fujitsu.com>
Cc: util-linux@vger.kernel.org
Subject: Re: libblkid: Idea to force given cached entry to be invalidated?
Date: Tue, 15 Apr 2014 00:27:29 -0400 [thread overview]
Message-ID: <20140415042729.GC3403@thunk.org> (raw)
In-Reply-To: <534C9625.8030906@cn.fujitsu.com>
On Tue, Apr 15, 2014 at 10:15:01AM +0800, Qu Wenruo wrote:
>
> Though the above patch try to avoid the whole cache, it's not good enough
> since it break the pricible not
> to probe the devices too frequently.
>
> After some searching, it seems that libblkid does not provide such API, or
> am I missing something?
The blkid_verify() function is designed to make sure the information
in the cache corresponds with reality. If it does not, it will update
the cache to match with reality, so it will do what you want.
Using blkid_verify() will involve accessing the disk involved, but
that's still better than the alternative of scanning all of the disks
in the system.
Cheers,
- Ted
next prev parent reply other threads:[~2014-04-15 4:27 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-15 2:15 libblkid: Idea to force given cached entry to be invalidated? Qu Wenruo
2014-04-15 4:27 ` Theodore Ts'o [this message]
2014-04-15 4:52 ` Qu Wenruo
2014-04-15 11:21 ` Karel Zak
2014-04-16 0:53 ` Qu Wenruo
2014-04-16 9:03 ` Karel Zak
2014-04-17 1:17 ` Qu Wenruo
2014-04-17 8:21 ` Karel Zak
2014-04-17 8:29 ` Qu Wenruo
2014-04-18 11:02 ` Karel Zak
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