I can confirm that this patch corrects the ext4 regressions I reported on 3.16-rc1 for data_journal. Additionally, it corrects regressions for two other tests I have not yet reported. Those tests include generic/263 when running with the data=journal mount option, and generic/219 (a quota test that doesn't use fsx) when running with all xfstests-bld scenarios (4k, ext4, nojournal, 1k, etc.) with the exception of bigalloc. The generic/219 failure on bigalloc in 3.16-rc1 is not a regression, and was present in earlier releases. With this patch, ext4 3.16-rc3 regression results on x64_64 should look much more like 3.15 final. Thanks guys! Eric * Wilcox, Matthew R <matthew.r.wilcox@xxxxxxxxx>: > Acked-by: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx> > ________________________________________ > From: Namjae Jeon [namjae.jeon@xxxxxxxxxxx] > Sent: June 27, 2014 4:38 AM > To: 'Andrew Morton' > Cc: linux-mm@xxxxxxxxx; linux-ext4; Lukáš Czerner; Wilcox, Matthew R; 'Eric Whitney'; Ashish Sangwan > Subject: [PATCH] msync: fix incorrect fstart calculation > > Fix a regression caused by Commit 7fc34a62ca mm/msync.c: sync only > the requested range in msync(). > xfstests generic/075 fail occured on ext4 data=journal mode because > the intended range was not syncing due to wrong fstart calculation. > > Cc: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx> > Cc: Lukáš Czerner <lczerner@xxxxxxxxxx> > Reported-by: Eric Whitney <enwlinux@xxxxxxxxx> > Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx> > Signed-off-by: Ashish Sangwan <a.sangwan@xxxxxxxxxxx> > --- > mm/msync.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/mm/msync.c b/mm/msync.c > index a5c6736..ad97dce 100644 > --- a/mm/msync.c > +++ b/mm/msync.c > @@ -78,7 +78,8 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags) > goto out_unlock; > } > file = vma->vm_file; > - fstart = start + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); > + fstart = (start - vma->vm_start) + > + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); > fend = fstart + (min(end, vma->vm_end) - start) - 1; > start = vma->vm_end; > if ((flags & MS_SYNC) && file && > -- > 1.7.11-rc0 > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>