On Thu, Feb 16, 2012 at 03:41:45PM -0800, Eric Sandeen wrote: > From: Martin.Wilck@xxxxxxxxxxxxxx > > Processes hang forever on a sync-mounted ext2 file system that > is mounted with the ext4 module (default in Fedora 16). > > I can reproduce this reliably by mounting an ext2 partition with > "-o sync" and opening a new file an that partition with vim. vim > will hang in "D" state forever. The same happens on ext4 without > a journal. > > I am attaching a small patch here that solves this issue for me. > In the sync mounted case without a journal, > ext4_handle_dirty_metadata() may call sync_dirty_buffer(), which > can't be called with buffer lock held. > > Also move mb_cache_entry_release inside lock to avoid race > fixed previously by 8a2bfdcb ext[34]: EA block reference count racing fix > Nonte too that ext2 fixed this same problem in 2006 with > b2f49033 [PATCH] fix deadlock in ext2 > > Signed-off-by: Martin.Wilck@xxxxxxxxxxxxxx > [sandeen@xxxxxxxxxx: move mb_cache_entry_release before unlock, edit commit msg] > Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx> Thanks, applied. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
