From: bugzilla-daemon@bugzilla.kernel.org
To: linux-ext4@vger.kernel.org
Subject: [Bug 105121] lseek(SEEK_DATA) hangs for a long time for sparse files in the page cache
Date: Mon, 28 Sep 2015 14:52:14 +0000 [thread overview]
Message-ID: <bug-105121-13602-mlgnznpV7m@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-105121-13602@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=105121
--- Comment #2 from ValdikSS <iam@valdikss.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.
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next prev parent reply other threads:[~2015-09-28 14:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-28 12:27 [Bug 105121] New: lseek() hangs for a long time on allocated files bugzilla-daemon
2015-09-28 14:37 ` [Bug 105121] lseek(SEEK_DATA) hangs for a long time for sparse files in the page cache bugzilla-daemon
2015-09-28 14:47 ` bugzilla-daemon
2015-09-28 14:52 ` bugzilla-daemon [this message]
2015-09-28 15:15 ` bugzilla-daemon
2015-09-28 15:23 ` bugzilla-daemon
2019-01-18 7:44 ` bugzilla-daemon
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