The patch titled
md: make sure the events count in an md array never returns to zero
has been added to the -mm tree. Its filename is
md-make-sure-the-events-count-in-an-md-array-never-returns-to-zero.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: md: make sure the events count in an md array never returns to zero
From: NeilBrown <neilb@xxxxxxx>
Now that we sometimes step the array events count backwards (when
transitioning dirty->clean where nothing else interesting has happened - so
that we don't need to write to spares all the time), it is possible for the
event count to return to zero, which is potentially confusing and triggers and
MD_BUG.
We could possibly remove the MD_BUG, but is just as easy, and probably safer,
to make sure we never return to zero.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/md.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN drivers/md/md.c~md-make-sure-the-events-count-in-an-md-array-never-returns-to-zero drivers/md/md.c
--- a/drivers/md/md.c~md-make-sure-the-events-count-in-an-md-array-never-returns-to-zero
+++ a/drivers/md/md.c
@@ -1633,7 +1633,8 @@ repeat:
* and 'events' is odd, we can roll back to the previous clean state */
if (nospares
&& (mddev->in_sync && mddev->recovery_cp == MaxSector)
- && (mddev->events & 1))
+ && (mddev->events & 1)
+ && mddev->events != 1)
mddev->events--;
else {
/* otherwise we have to go forward and ... */
_
Patches currently in -mm which might be from neilb@xxxxxxx are
knfsd-update-email-address-and-status-for-nfsd-in-maintainers.patch
knfsd-fix-setting-of-acl-server-versions.patch
knfsd-fix-an-nfsd-bug-with-full-sized-non-page-aligned-reads.patch
knfsd-replace-some-warning-ins-nfsfhh-with-bug_on-or-warn_on.patch
knfsd-dont-mess-with-the-mode-when-storing-a-exclusive-create-cookie.patch
md-update-email-address-and-status-for-md-in-maintainers.patch
md-make-repair-actually-work-for-raid1.patch
md-make-sure-the-events-count-in-an-md-array-never-returns-to-zero.patch
md-avoid-reading-past-the-end-of-a-bitmap-file.patch
use-correct-macros-in-raid-code-not-raw-asm.patch
use-correct-macros-in-raid-code-not-raw-asm-include.patch
igrab-should-check-for-i_clear.patch
knfsd-sunrpc-update-internal-api-separate-pmap-register-and-temp-sockets.patch
knfsd-sunrpc-allow-creating-an-rpc-service-without-registering-with-portmapper.patch
knfsd-sunrpc-cache-remote-peers-address-in-svc_sock.patch
knfsd-sunrpc-use-sockaddr_storage-to-store-address-in-svc_deferred_req.patch
knfsd-sunrpc-add-a-function-to-format-the-address-in-an-svc_rqst-for-printing.patch
include-linux-nfsd-consth-remove-nfs_super_magic.patch
readahead-nfsd-case.patch
readahead-nfsd-case-fix.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
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