linux-stable.git/drivers/block/drbd, branch linux-2.6.37.y Linux kernel stable tree drbd: fix for spin_lock_irqsave in endio callback 2010-11-27T18:50:43+00:00 Lars Ellenberg lars.ellenberg@linbit.com 2010-11-13T19:42:29+00:00 a115413de13ae6beb0cbfc198afe385a261ab284 In commit 9b7f76dc37919ea36caa9680a3f765e5b19b25fb, Author: Lars Ellenberg <lars.ellenberg@linbit.com> Date: Wed Aug 11 23:40:24 2010 +0200 drbd: new configuration parameter c-min-rate a bad chunk slipped through, which is now reverted as well, restoring the correct irqsave for the endio callback. This patch also add comments at both req_mod() and in the endio callback so it should not happen again. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> 
In commit 9b7f76dc37919ea36caa9680a3f765e5b19b25fb,
 Author: Lars Ellenberg <lars.ellenberg@linbit.com>
 Date:   Wed Aug 11 23:40:24 2010 +0200

    drbd: new configuration parameter c-min-rate

a bad chunk slipped through, which is now reverted as well,
restoring the correct irqsave for the endio callback.

This patch also add comments at both req_mod()
and in the endio callback so it should not happen again.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
drbd: don't recvmsg with zero length 2010-11-27T18:50:43+00:00 Lars Ellenberg lars.ellenberg@linbit.com 2010-10-29T21:32:01+00:00 c13f7e1a94007c4381814e7daf033e3e8f0663f3 This should fix a performance degradation we observed recently. If we don't expect any subheader, we should not call into the tcp stack, as that may add considerable latency if there is no data available at this point. For a synthetic synchronous write load with single outstanding writes, this additional latency when processing the "unplug remote" packet added up to a performance degradation factor >= 10. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> 
This should fix a performance degradation we observed recently.

If we don't expect any subheader, we should not call into the tcp stack,
as that may add considerable latency if there is no data available at
this point.

For a synthetic synchronous write load with single outstanding writes,
this additional latency when processing the "unplug remote" packet
added up to a performance degradation factor >= 10.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
BKL: remove extraneous #include <smp_lock.h> 2010-11-17T16:59:32+00:00 Arnd Bergmann arnd@arndb.de 2010-11-17T15:26:55+00:00 451a3c24b0135bce54542009b5fde43846c7cf67 The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
The big kernel lock has been removed from all these files at some point,
leaving only the #include.

Remove this too as a cleanup.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge branch 'for-2.6.37/drivers' into for-linus 2010-11-10T13:51:27+00:00 Jens Axboe jaxboe@fusionio.com 2010-11-10T13:51:27+00:00 00e375e7e962f938f6b3c93e4cd097a5e26cc788 Conflicts: drivers/block/cciss.c Signed-off-by: Jens Axboe <jaxboe@fusionio.com> 
Conflicts:
	drivers/block/cciss.c

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
block: read i_size with i_size_read() 2010-11-10T13:40:53+00:00 Mike Snitzer snitzer@redhat.com 2010-11-08T13:39:12+00:00 77304d2abac6101f7249754ffdd4421258877ab0 Convert direct reads of an inode's i_size to using i_size_read(). i_size_{read,write} use a seqcount to protect reads from accessing incomple writes. Concurrent i_size_write()s require mutual exclussion to protect the seqcount that is used by i_size_{read,write}. But i_size_read() callers do not need to use additional locking. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: NeilBrown <neilb@suse.de> Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com> 
Convert direct reads of an inode's i_size to using i_size_read().

i_size_{read,write} use a seqcount to protect reads from accessing
incomple writes.  Concurrent i_size_write()s require mutual exclussion
to protect the seqcount that is used by i_size_{read,write}.  But
i_size_read() callers do not need to use additional locking.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: NeilBrown <neilb@suse.de>
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
drivers/block/drbd/drbd_main.c: fix error path 2010-10-28T12:15:26+00:00 Nicolas Kaiser nikai@nikai.net 2010-10-28T12:15:26+00:00 2027ae1fa914640c287171035cb607a03ad36e95 Failure to create drbd_ee_mempool appears not to get checked. Looks like a copy-and-paste problem to me. Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com> 
Failure to create drbd_ee_mempool appears not to get checked.  Looks like
a copy-and-paste problem to me.

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Cc: Lars Ellenberg <drbd-dev@lists.linbit.com>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Merge branch 'for-jens' of git://git.drbd.org/linux-2.6-drbd into for-2.6.37/drivers 2010-10-23T16:43:55+00:00 Jens Axboe jaxboe@fusionio.com 2010-10-23T16:43:55+00:00 53c2eb24ff49abe1bfc45d067797f74b409690d8 






drbd: Removed checks for REQ_HARDBARRIER on incomming BIOs
2010-10-23T11:02:34+00:00

Philipp Reisner
philipp.reisner@linbit.com

2010-08-25T08:47:17+00:00

650789c87f16dcdf1dd0a67ac7461b7537534855

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>





Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>







drbd: REQ_HARDBARRIER -> REQ_FUA transition for meta data accesses
2010-10-23T11:01:45+00:00

Philipp Reisner
philipp.reisner@linbit.com

2010-08-25T08:21:04+00:00

a8a4e51e6965db84d2af041370ea2ab6232aa4f1

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>





Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>







drbd: Removed the BIO_RW_BARRIER support form the receiver/epoch code
2010-10-23T11:00:48+00:00

Philipp Reisner
philipp.reisner@linbit.com

2010-08-24T11:43:11+00:00

2451fc3b2bd3a7205270da75a21dde0d5d7c96a2

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>





Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>