Re: reconciliation between firefly and v0.80.8.2

[Loic Dachary <loic@dachary.org>]

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On 24/07/2015 19:06, Loic Dachary wrote:
> Hi Ken,
> 
> The commits with a + are found in v0.80.8.2 and are not in firefly
> 
> $ git rev-parse ceph/hammer
> eb69cf758eb25e7ac71e36c754b9b959edb67cee
> $ git --no-pager cherry -v ceph/firefly tags/v0.80.8.2
> + d75a9e374e6581c57461018952ed125c929aeb30 build: remove LIBPERFGLUE from LIBMDS
> - 2cbe4fb6436dc959eb54cbcc5226b5ebff974d8d init-radosgw.sysv: set ulimit -n before starting daemon
> - f38b7b407325d14868c2798035282f1e29e92485 init-radosgw*: don't require rgw_socket_path to be defined
> - 0ccd1d379d02da5371cebf962465757b0ac741ab Revert "rbd: ObjectCacher reads can hang when reading sparse files"
> - ec711a9f30ac829f6504038063babd51f4b50488 Revert "Enforce cache size on read requests"
> - c7fdbabb237a78aa7a7c282725ce438f60bc4d75 osdc: Constrain max number of in-flight read requests
> + 00b6fb027bb6fccda6716ef577464d30d96959cc 0.80.8.1
> + b31da9435817d057a558c9222a246569d0a632b3 rgw: remove meta file after deleting bucket The meta file is deleted only if the bucket meta data is not synced
> - 63c67434d22d16d7f72032c596e7563c20ce3b6a rgw: use correct objv_tracker for bucket instance
> - ed8fb953580a9d23c9a036c475659528d48eedff rgw: don't overwrite bucket / object owner when setting acls
> + 096488b188a79fc7132e73cf88d6004f369bceb3 CephContext: Add AssociatedSingletonObject to allow CephContext's singleton
> + 510df4f61367d4b93574251bd0842cc8247c9bf9 common/ceph_context: don't import std namespace
> + e4fa039c592b50f6406cecd060ed2f673cb5ee7e WorkQueue: add new ContextWQ work queue
> + 78d48d89ab18479d71d7220fe9ba9c2aa9752476 WorkQueue: added virtual destructor
> + b82ff103892612e6685a5c5db56082d9565881f6 librbd: add task pool / work queue for AIO requests
> + f94a88f50078670eebb8a90d923fcb3477a636ac librbd: avoid blocking AIO API methods
> + 316f08e4ee65f9eda8761972ba2d337e94abcac7 librbd: add new fail method to AioCompletion
> + ac87e43be3ca7029a4260f4e52dff39144b7c88f Throttle: added pending_error method to SimpleThrottle
> + 09705dd9f2dcd9c54dd7a478293ec7fc60f3cf92 librbd: internal AIO methods no longer return result
> + 0600f5f8cf55803da919d6d69b94ed5ed5a1ac2b tests: update librbd AIO tests to remove result code
> + 890e5bca5c71740025b2e8ff8bad863fc7e9b33e librbd: AioRequest::send no longer returns a result
> + 6ce86f1f1bd6cc3b7995fa5ba34507c8aa21f608 librbd: new rbd_non_blocking_aio config option
> + f839ef6ed214dc0847da59742b0c7fa41cceaeea tests: verify librbd blocking aio code path
> - d0d8555341e297ecbbf62ed3cec179b0e2fbe14f ceph.spec: add mkcephfs to ceph.rpm
> - 3088167a85ba641b000deb9214b27c0681a745a8 ceph.spec.in: package mkcephfs on EL6
> + 08ac26392cd369d0047dfa7a70c8fe693c63ead5 0.80.8.2
> 
> * build: remove LIBPERFGLUE from LIBMDS 
>   is unique to v0.80.8.2 and it is unclear why it was found to be usefu in isolation. An issue for firefly backport of http://tracker.ceph.com/issues/10691 was open at http://tracker.ceph.com/issues/12461#note-1
> 
> * rgw: remove meta file after deleting bucket The meta file is deleted only if the bucket meta data is not synced
>   is being tested and is patch-id identical as shown by the leading minus (-) which would have been an + if they were different
> 
>   pr=4641 ; git fetch ceph +refs/pull/$pr/*:refs/pull/$pr/*
>   $ git --no-pager cherry -v refs/pull/4641/merge tags/v0.80.8.2 | grep 'rgw: remove meta file after deleting'
> - b31da9435817d057a558c9222a246569d0a632b3 rgw: remove meta file after deleting bucket The meta file is deleted only if the bucket meta data is not synced
> 
> * The bulk of the differences from 096488b188a79fc7132e73cf88d6004f369bceb3 to f839ef6ed214dc0847da59742b0c7fa41cceaeea are pending integration in https://github.com/ceph/ceph/pull/4854. If this pull request was merged, there would still be two commits that are not patch-id identical:
> 
> pr=4854 ; git fetch ceph +refs/pull/$pr/*:refs/pull/$pr/*
> git --no-pager cherry -v refs/pull/4854/merge tags/v0.80.8.2
> + d75a9e374e6581c57461018952ed125c929aeb30 build: remove LIBPERFGLUE from LIBMDS
> - 2cbe4fb6436dc959eb54cbcc5226b5ebff974d8d init-radosgw.sysv: set ulimit -n before starting daemon
> - f38b7b407325d14868c2798035282f1e29e92485 init-radosgw*: don't require rgw_socket_path to be defined
> - 0ccd1d379d02da5371cebf962465757b0ac741ab Revert "rbd: ObjectCacher reads can hang when reading sparse files"
> - ec711a9f30ac829f6504038063babd51f4b50488 Revert "Enforce cache size on read requests"
> - c7fdbabb237a78aa7a7c282725ce438f60bc4d75 osdc: Constrain max number of in-flight read requests
> + 00b6fb027bb6fccda6716ef577464d30d96959cc 0.80.8.1
> + b31da9435817d057a558c9222a246569d0a632b3 rgw: remove meta file after deleting bucket The meta file is deleted only if the bucket meta data is not synced
> - 63c67434d22d16d7f72032c596e7563c20ce3b6a rgw: use correct objv_tracker for bucket instance
> - ed8fb953580a9d23c9a036c475659528d48eedff rgw: don't overwrite bucket / object owner when setting acls
> - 096488b188a79fc7132e73cf88d6004f369bceb3 CephContext: Add AssociatedSingletonObject to allow CephContext's singleton
> - 510df4f61367d4b93574251bd0842cc8247c9bf9 common/ceph_context: don't import std namespace
> - e4fa039c592b50f6406cecd060ed2f673cb5ee7e WorkQueue: add new ContextWQ work queue
> - 78d48d89ab18479d71d7220fe9ba9c2aa9752476 WorkQueue: added virtual destructor
> + b82ff103892612e6685a5c5db56082d9565881f6 librbd: add task pool / work queue for AIO requests
> - f94a88f50078670eebb8a90d923fcb3477a636ac librbd: avoid blocking AIO API methods
> + 316f08e4ee65f9eda8761972ba2d337e94abcac7 librbd: add new fail method to AioCompletion
> - ac87e43be3ca7029a4260f4e52dff39144b7c88f Throttle: added pending_error method to SimpleThrottle
> - 09705dd9f2dcd9c54dd7a478293ec7fc60f3cf92 librbd: internal AIO methods no longer return result
> - 0600f5f8cf55803da919d6d69b94ed5ed5a1ac2b tests: update librbd AIO tests to remove result code
> - 890e5bca5c71740025b2e8ff8bad863fc7e9b33e librbd: AioRequest::send no longer returns a result
> - 6ce86f1f1bd6cc3b7995fa5ba34507c8aa21f608 librbd: new rbd_non_blocking_aio config option
> - f839ef6ed214dc0847da59742b0c7fa41cceaeea tests: verify librbd blocking aio code path
> - d0d8555341e297ecbbf62ed3cec179b0e2fbe14f ceph.spec: add mkcephfs to ceph.rpm
> - 3088167a85ba641b000deb9214b27c0681a745a8 ceph.spec.in: package mkcephfs on EL6
> + 08ac26392cd369d0047dfa7a70c8fe693c63ead5 0.80.8.2
> The first is cosmetic:
> 
> librbd: add task pool / work queue for AIO requests
> $ diff -u --ignore-matching-lines '^[^+-]' <(git show b82ff103892612e6685a5c5db56082d9565881f6) <(git show 220a23e8d99882838626d5647f9c055eefeb28c6) 
> --- /dev/fd/63	2015-07-24 18:40:24.350584528 +0200
> +++ /dev/fd/62	2015-07-24 18:40:24.350584528 +0200
> @@ -62,13 +62,12 @@
>     ImageCtx::ImageCtx(const string &image_name, const string &image_id,
>   		     const char *snap, IoCtx& p, bool ro)
>       : cct((CephContext*)p.cct()),
> -@@ -51,7 +69,8 @@ namespace librbd {
> -       format_string(NULL),
> +@@ -53,7 +71,7 @@ namespace librbd {
>         id(image_id), parent(NULL),
>         stripe_unit(0), stripe_count(0),
> --      object_cacher(NULL), writeback_handler(NULL), object_set(NULL)
> -+      object_cacher(NULL), writeback_handler(NULL), object_set(NULL),
> -+      aio_work_queue(NULL)
> +       object_cacher(NULL), writeback_handler(NULL), object_set(NULL),
> +-      pending_aio(0)
> ++      pending_aio(0), aio_work_queue(NULL)
>     {
>       md_ctx.dup(p);
>       data_ctx.dup(p);
> 
> The second is not obvious to me
> 
> librbd: add new fail method to AioCompletion
> 
> $ diff -u --ignore-matching-lines '^[^+-]' <(git show 316f08e4ee65f9eda8761972ba2d337e94abcac7) <(git show 8ec341ee8f256e8ab91a931f6005e1ebd4b1db60) 
> --- /dev/fd/63	2015-07-24 18:45:12.837559514 +0200
> +++ /dev/fd/62	2015-07-24 18:45:12.841559500 +0200
> @@ -58,6 +57,13 @@
>  +      break;
>  +    }
>  +
> ++    if (ictx != NULL) {
> ++      Mutex::Locker l(ictx->aio_lock);
> ++      assert(ictx->pending_aio != 0);
> ++      --ictx->pending_aio;
> ++      ictx->pending_aio_cond.Signal();
> ++    }
> ++
>  +    if (complete_cb) {
>  +      complete_cb(rbd_comp, complete_arg);
>  +    }
> @@ -113,6 +119,14 @@
>  -	lderr(ictx->cct) << "completed invalid aio_type: " << aio_type << dendl;
>  -	break;
>  -      }
> +-
> +-      {
> +-        Mutex::Locker l(ictx->aio_lock);
> +-        assert(ictx->pending_aio != 0);
> +-        --ictx->pending_aio;
> +-        ictx->pending_aio_cond.Signal();
> +-      }
> +-
>  -      if (complete_cb) {
>  -	complete_cb(rbd_comp, complete_arg);
>  -      }
> 

After a discussion with Jason Dillaman, this difference is because the v0.80.8.2 branch does not have pending_aio counters. Firefly has pending_aio counters and needs these additional hunks.

> Cheers
> 

-- 
Loïc Dachary, Artisan Logiciel Libre


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