| Message ID | CAPcyv4hDfxpYh1rvvqFCQ+eNk_XxZD3grUOYkHWbERfxky43xQ@mail.gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [GIT,PULL] dax fixes for v5.13-rc2 | expand |
The pull request you sent on Fri, 14 May 2021 16:33:22 -0700:
> git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm tags/dax-fixes-5.13-rc2
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/393f42f113b607786207449dc3241d05ec61d5dc
Thank you!
diff --cc fs/dax.c index 69216241392f,df5485b4bddf..62352cbcf0f4 --- a/fs/dax.c
Hi Linus, please pull from: git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm tags/dax-fixes-5.13-rc2 ...to receive a fix for a hang condition in the filesystem-dax core when exercised by virtiofs. This bug has been there from the beginning, but the condition has not triggered on other filesystems since they hold a lock over invalidation events. The changes have appeared in -next with no reported issues. The patches were originally against v5.12 so you will see a minor conflict with Willy's nr_exceptional changes. My proposed conflict resolution appended below. --- The following changes since commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717: Linux 5.12 (2021-04-25 13:49:08 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm tags/dax-fixes-5.13-rc2 for you to fetch changes up to 237388320deffde7c2d65ed8fc9eef670dc979b3: dax: Wake up all waiters after invalidating dax entry (2021-05-07 15:55:44 -0700) ---------------------------------------------------------------- dax fixes for 5.13-rc2 - Fix a hang condition (missed wakeups with virtiofs when invalidating entries) ---------------------------------------------------------------- Vivek Goyal (3): dax: Add an enum for specifying dax wakup mode dax: Add a wakeup mode parameter to put_unlocked_entry() dax: Wake up all waiters after invalidating dax entry fs/dax.c | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-) +++ b/fs/dax.c @@@ -524,8 -535,8 +535,8 @@@ retry dax_disassociate_entry(entry, mapping, false); xas_store(xas, NULL); /* undo the PMD join */ - dax_wake_entry(xas, entry, true); + dax_wake_entry(xas, entry, WAKE_ALL); - mapping->nrexceptional--; + mapping->nrpages -= PG_PMD_NR; entry = NULL; xas_set(xas, index); } @@@ -661,10 -672,10 +672,10 @@@ static int __dax_invalidate_entry(struc goto out; dax_disassociate_entry(entry, mapping, trunc); xas_store(&xas, NULL); - mapping->nrexceptional--; + mapping->nrpages -= 1UL << dax_entry_order(entry); ret = 1; out: - put_unlocked_entry(&xas, entry); + put_unlocked_entry(&xas, entry, WAKE_ALL); xas_unlock_irq(&xas); return ret; }