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e7a88e82fe
linux/net/ceph
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Ilya Dryomov e7a88e82fe libceph: don't bail early from try_read() when skipping a message 
The contract between try_read() and try_write() is that when called
each processes as much data as possible.  When instructed by osd_client
to skip a message, try_read() is violating this contract by returning
after receiving and discarding a single message instead of checking for
more.  try_write() then gets a chance to write out more requests,
generating more replies/skips for try_read() to handle, forcing the
messenger into a starvation loop.

Cc: stable@vger.kernel.org # 3.10+
Reported-by: Varada Kari <Varada.Kari@sandisk.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Tested-by: Varada Kari <Varada.Kari@sandisk.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2016-02-24 20:28:31 +01:00
..
crush crush: add chooseleaf_stable tunable 2016-02-04 18:25:55 +01:00
armor.c
auth_none.c libceph: Fix NULL pointer dereference in auth client code 2013-07-03 15:32:55 -07:00
auth_none.h net: 8021q/bluetooth/bridge/can/ceph: Remove extern from function prototypes 2013-10-19 19:12:11 -04:00
auth_x_protocol.h
auth_x.c libceph: kill off ceph_x_ticket_handler::validity 2016-01-21 19:36:09 +01:00
auth_x.h libceph: kill off ceph_x_ticket_handler::validity 2016-01-21 19:36:09 +01:00
auth.c libceph: wrap auth methods in a mutex 2013-05-01 21:17:15 -07:00
buffer.c libceph: nuke ceph_kvfree() 2014-12-17 20:09:50 +03:00
ceph_common.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2015-11-13 09:24:40 -08:00
ceph_fs.c
ceph_hash.c
ceph_strings.c libceph: nuke pool op infrastructure 2015-02-19 13:31:37 +03:00
crypto.c KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
crypto.h libceph: introduce ceph_x_authorizer_cleanup() 2015-11-02 23:36:48 +01:00
debugfs.c libceph: expose client options through debugfs 2015-04-20 18:55:39 +03:00
Kconfig libceph: select CRYPTO_CBC in addition to CRYPTO_AES 2014-10-14 21:03:20 +04:00
Makefile libceph: create source file "net/ceph/snapshot.c" 2013-05-01 21:20:08 -07:00
messenger.c libceph: don't bail early from try_read() when skipping a message 2016-02-24 20:28:31 +01:00
mon_client.c libceph: remove outdated comment 2016-01-21 19:36:09 +01:00
msgpool.c
osd_client.c libceph: MOSDOpReply v7 encoding 2016-02-04 18:26:08 +01:00
osdmap.c crush: decode and initialize chooseleaf_stable 2016-02-04 18:25:58 +01:00
pagelist.c libceph: reference counting pagelist 2014-10-14 12:56:48 -07:00
pagevec.c libceph: use kvfree() instead of open-coding it 2015-06-25 11:49:28 +03:00
snapshot.c libceph: create source file "net/ceph/snapshot.c" 2013-05-01 21:20:08 -07:00