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Diffstat (limited to 'open_issues/git_duplicated_content.mdwn')
| -rw-r--r-- | open_issues/git_duplicated_content.mdwn | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/open_issues/git_duplicated_content.mdwn b/open_issues/git_duplicated_content.mdwn new file mode 100644 index 00000000..3b4bc44b --- /dev/null +++ b/open_issues/git_duplicated_content.mdwn @@ -0,0 +1,125 @@ +[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +[[!tag open_issue_porting]] + + $ git-new-workdir ~/tmp/binutils/git /media/hd1s1/tmp/master master + error: unable to create file gas/testsuite/gas/arm/attr-mfpu-vfpv3-d16.d (Interrupted system call) + Checking out files: 100% (12315/12315), done. + Already on 'master' + $ cd /media/hd1s1/tmp/master + $ git status + # On branch master + # Changes not staged for commit: + # (use "git add <file>..." to update what will be committed) + # (use "git checkout -- <file>..." to discard changes in working directory) + # + # modified: gas/testsuite/gas/arm/attr-mfpu-vfpv3-d16.d + # + no changes added to commit (use "git add" and/or "git commit -a") + $ git checkout -f + $ git status + # On branch master + nothing to commit (working directory clean) + +([[Git issue|git-core-2]] is known.) + + $ git-new-workdir ~/tmp/binutils/git /media/hd1s2/tmp/master master + error: unable to create file bfd/elf32-dlx.c (Interrupted system call) + error: unable to create file bfd/sunos.c (Interrupted system call) + error: unable to create file gas/testsuite/gas/arm/attr-mfpu-vfpv3-d16.d (Interrupted system call) + error: unable to create file gas/testsuite/gas/mmix/regx-op.d (Interrupted system call) + error: unable to create file gas/testsuite/gas/tic6x/reloc-bad-4.s (Interrupted system call) + error: unable to create file gold/testsuite/script_test_2.t (Interrupted system call) + error: unable to create file ld/testsuite/ld-mmix/loc7m.d (Interrupted system call) + error: unable to create file ld/testsuite/ld-powerpc/tlsexe.g (Interrupted system call) + Checking out files: 100% (12315/12315), done. + Already on 'master' + $ cd /media/hd1s2/tmp/master + $ git status + # On branch master + # Changes not staged for commit: + # (use "git add <file>..." to update what will be committed) + # (use "git checkout -- <file>..." to discard changes in working directory) + # + # modified: bfd/elf32-dlx.c + # modified: bfd/sunos.c + # modified: gas/testsuite/gas/arm/attr-mfpu-vfpv3-d16.d + # modified: gas/testsuite/gas/mmix/regx-op.d + # modified: gas/testsuite/gas/tic6x/reloc-bad-4.s + # modified: gold/testsuite/script_test_2.t + # modified: ld/testsuite/ld-mmix/loc7m.d + # modified: ld/testsuite/ld-powerpc/tlsexe.g + # + no changes added to commit (use "git add" and/or "git commit -a") + $ git checkout -f + $ git status + # On branch master + nothing to commit (working directory clean) + +Now you'd expect these directories to have identical content, but: + + $ diff -x .git -ru /media/hd1s{1,2}/tmp/master/ > /tmp/diff + $ ls -l /tmp/diff + -rw-r--r-- 1 thomas thomas 613677 10. Jun 19:12 /tmp/diff + $ grep '^[^ @+-]' < /tmp/diff + diff -x .git -ru /media/hd1s1/tmp/master//ld/configure /media/hd1s2/tmp/master//ld/configure + +(Note that this isn't a file that Git had issues with.) + +Try again: + + $ diff -x .git -ru /media/hd1s{1,2}/tmp/master/ > /tmp/diff_ + $ ls -l /tmp/diff* + -rw-r--r-- 1 thomas thomas 613677 10. Jun 19:12 /tmp/diff + -rw-r--r-- 1 thomas thomas 613677 10. Jun 19:17 /tmp/diff_ + $ cmp /tmp/diff{,_}; echo $? + 0 + +At least it's consistent. Force a reload: + + # settrans -ag /media/hd1s1 + # settrans -ag /media/hd1s2 + +Try again: + + $ diff -x .git -ru /media/hd1s{1,2}/tmp/master/ > /tmp/diff__ + $ ls -l /tmp/diff* + -rw-r--r-- 1 thomas thomas 613677 10. Jun 19:12 /tmp/diff + -rw-r--r-- 1 thomas thomas 613677 10. Jun 19:17 /tmp/diff_ + -rw-r--r-- 1 thomas thomas 613677 10. Jun 19:30 /tmp/diff__ + $ cmp /tmp/diff{,__}; echo $? + 0 + +Consistent; thus very likely corrupt on-disk. + +After a few tries, the pattern generally is that for the files where there are +differences, once the file regularely ends, its content appears once more. +That is, the files' content appears once (regularely), and then the same again. + +Some more copying: + + $ (cd /media/hd1s1/tmp/ && cp -a master master_) + $ (cd /media/hd1s2/tmp/ && cp -a master master_) + $ diff -x .git -ru /media/hd1s1/tmp/master{,_}/ > /tmp/diff1 + $ diff -x .git -ru /media/hd1s2/tmp/master{,_}/ > /tmp/diff2 + $ ls -l /tmp/diff{1,2} + -rw-r--r-- 1 thomas thomas 0 10. Jun 19:46 /tmp/diff1 + -rw-r--r-- 1 thomas thomas 0 10. Jun 19:46 /tmp/diff2 + +No further difference. + +--- + + $ git-new-workdir git master master + $ diff -x .git -ur tar_master/ master/ > master.diff + + $ rm -rf ar_master* && (cd git/ && git archive master) | (mkdir ar_master && cd ar_master/ && tar -x) && diff -x .git -ru tar_master/ ar_master/ > ar_master.diff; ls -l ar_master.diff + $ (cd git/ && git archive master) | md5sum |