linux-kernel - question regarding the Linux block device cache

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4ae3c140703091424i25a0a3fcm6ba9d7bf348d04b6@mail.gmail.com>
Date:	Fri, 9 Mar 2007 17:24:18 -0500
From:	"Xin Zhao" <uszhaoxin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: question regarding the Linux block device cache

Hi,

I am working on a file system that allow multiple files to share data
blocks. That is, a data block can be shared by two or more files. Now
my question is: suppose file A and B share the same data block D. Now
a process open file A and read block D, then this process closes file
A. If another process open file B and read block D right after the
first process closes A, is the data of block D read from some cache or
has to be loaded from disk again? I think this has to do with the
Linux block device buffer cache. But I am not quite familiar with this
part.

Can someone help me or direct me to the right place to find the answer?

Thanks in advance!

-x
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/