From: Jinshan Xiong <jinshan.xiong@xxxxxxxxx> Writing thread already locked page #1, and then wait for the Writeback bit of page #2; Ptlrpc thread is composing a write RPC, so it sets Writeback on page #2 and tries to lock page #1 to make it ready. Deadlocked. Signed-off-by: Jinshan Xiong <jinshan.xiong@xxxxxxxxx> Reviewed-on: http://review.whamcloud.com/9036 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4540 Reviewed-by: wangdi <di.wang@xxxxxxxxx> Signed-off-by: Oleg Drokin <green@xxxxxxxxxxxxxx> --- drivers/staging/lustre/lustre/llite/rw26.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c index 50d8289..f87238b 100644 --- a/drivers/staging/lustre/lustre/llite/rw26.c +++ b/drivers/staging/lustre/lustre/llite/rw26.c @@ -512,7 +512,7 @@ static int ll_write_begin(struct file *file, struct address_space *mapping, /* To avoid deadlock, try to lock page first. */ vmpage = grab_cache_page_nowait(mapping, index); - if (unlikely(!vmpage || PageDirty(vmpage))) { + if (unlikely(!vmpage || PageDirty(vmpage) || PageWriteback(vmpage))) { struct ccc_io *cio = ccc_env_io(env); struct cl_page_list *plist = &cio->u.write.cui_queue; @@ -522,7 +522,7 @@ static int ll_write_begin(struct file *file, struct address_space *mapping, * more grants. It's okay for the dirty page to be the first * one in commit page list, though. */ - if (vmpage && PageDirty(vmpage) && plist->pl_nr > 0) { + if (vmpage && plist->pl_nr > 0) { unlock_page(vmpage); page_cache_release(vmpage); vmpage = NULL; -- 2.1.0 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
