On 2010-08-06, Lino Sanfilippo <lino.sanfili...@avira.com> wrote: > This fixes a bug that has been discovered by Julien Bourgeois: > > If a file within dazukofs is mmaped and the content is read and > afterwards the file is modified via write(), the content shown via > mmap() is still the same as it was before the write() call. In > other words, the content modification done by write() is not visible > for readers that use mmap. > > The reason is, that with mmap() memory pages are created for the > _upper_ file, whereas write() and read() only access pages that > belong to the lower file. When a lower page is modified after its > corresponding upper page has been created, the upper page is not > updated and thus both pages are out of sync. > > This patch ensures that the upper pages that correspond to the file > content that is modified via write() are marked dirty, so that a > subsequent read from it causes the content to be refreshed from > disk.
Thank you. The patch has been included in 3.1.4-rc1. John Ogness -- Dazuko Maintainer _______________________________________________ Dazuko-devel mailing list Dazuko-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/dazuko-devel
