linux-ext4 - [Bug 105121] lseek(SEEK_DATA) hangs for a long time for sparse files in the page 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-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <bug-105121-13602-mlgnznpV7m@https.bugzilla.kernel.org/>
Date:	Mon, 28 Sep 2015 14:52:14 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 105121] lseek(SEEK_DATA) hangs for a long time for sparse files
 in the page cache

https://bugzilla.kernel.org/show_bug.cgi?id=105121

--- Comment #2 from ValdikSS <iam@...dikss.org.ru> ---
>Out of curiosity, what was the use case that caused you to notice this?

A person was wondering why cat|grep works faster than grep file on usual files
and his test case involved creating file with fallocate and cat it before
grepping. He was apparently used btrfs and had 2 seconds difference while it
hang for me as grep does literally what's in the attached source.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html