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From: "P at draigBrady dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/18921] New: Regression: extraneous stat() and fstat() performed by opendir()
Date: Thu, 03 Sep 2015 22:54:00 -0000	[thread overview]
Message-ID: <bug-18921-131@http.sourceware.org/bugzilla/> (raw)

https://sourceware.org/bugzilla/show_bug.cgi?id=18921

            Bug ID: 18921
           Summary: Regression: extraneous stat() and fstat() performed by
                    opendir()
           Product: glibc
           Version: 2.22
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: roland at gnu dot org
          Reporter: P at draigBrady dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

As diagnosed by Bernhard Voelker,
since glibc-2.22 ... and specifically this commit:
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=glibc-2.21-360-g46f894d
opendir(".") has been changed from a simple openat() to this sequence of
stat()+open() as the following diff of `strace ls` outputs indicates:

   stat(".", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
  -openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
  +stat(".", {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
  +open(".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
  +fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0

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             reply	other threads:[~2015-09-03 22:54 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-03 22:54 P at draigBrady dot com [this message]
2015-09-03 23:15 ` [Bug libc/18921] " roland at gnu dot org
2015-09-08 21:02 ` roland at gnu dot org
2015-10-29 17:06 ` jsm28 at gcc dot gnu.org

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