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view tests/test-586.t @ 27430:e240e914d226 stable
revlog: seek to end of file before writing (issue4943)
Revlogs were recently refactored to open file handles in "a+" and use a
persistent file handle for reading and writing. This drastically
reduced the number of file handles being opened.
Unfortunately, it appears that some versions of Solaris lose the file
offset when performing a write after the handle has been seeked.
The simplest workaround is to seek to EOF on files opened in a+ mode
before writing to them, which is what this patch does.
Ideally, this code would exist in the vfs layer. However, this would
require creating a proxy class for file objects in order to provide a
custom implementation of write(). This would add overhead. Since
revlogs are the only files we open in a+ mode, the one-off workaround
in revlog.py should be sufficient.
This patch appears to have little to no impact on performance on my
Linux machine.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 17 Dec 2015 17:16:02 -0800 |
parents | f2719b387380 |
children |
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Issue586: removing remote files after merge appears to corrupt the dirstate $ hg init a $ cd a $ echo a > a $ hg ci -Ama adding a $ hg init ../b $ cd ../b $ echo b > b $ hg ci -Amb adding b $ hg pull -f ../a pulling from ../a searching for changes warning: repository is unrelated requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) (run 'hg heads' to see heads, 'hg merge' to merge) $ hg merge 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg rm -f a $ hg ci -Amc $ hg st -A C b $ cd .. Issue1433: Traceback after two unrelated pull, two move, a merge and a commit (related to issue586) create test repos $ hg init repoa $ touch repoa/a $ hg -R repoa ci -Am adda adding a $ hg init repob $ touch repob/b $ hg -R repob ci -Am addb adding b $ hg init repoc $ cd repoc $ hg pull ../repoa pulling from ../repoa requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (run 'hg update' to get a working copy) $ hg update 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ mkdir tst $ hg mv * tst $ hg ci -m "import a in tst" $ hg pull -f ../repob pulling from ../repob searching for changes warning: repository is unrelated requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) (run 'hg heads' to see heads, 'hg merge' to merge) merge both repos $ hg merge 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ mkdir src move b content $ hg mv b src $ hg ci -m "import b in src" $ hg manifest src/b tst/a $ cd ..