kernel.git/drivers/block/drbd/drbd_actlog.c, branch linux-3.4.y

drbd: we should write meta data updates with FLUSH FUA

2011-06-30T07:23:46Z

We used to write these with BIO_RW_BARRIER aka REQ_HARDBARRIER (unless disabled in the configuration). The correct semantic now would be to write with FLUSH/FUA. For example, with activity log transactions, FUA alone is not enough, we need the corresponding bitmap update (and all related application updates) on stable storage as well. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Fix spelling

2011-05-24T08:21:29Z

Found these with the help of ispell -l. Signed-off-by: Bart Van Assche Signed-off-by: Lars Ellenberg Signed-off-by: Philipp Reisner

Fix common misspellings

2011-03-31T14:26:23Z

Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi

drbd: Remove unused function atodb_endio()

2011-03-10T10:48:15Z

Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: kill dead code

2011-03-10T10:48:12Z

This code became obsolete and unused last December with drbd: bitmap keep track of changes vs on-disk bitmap Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: bitmap keep track of changes vs on-disk bitmap

2011-03-10T10:43:19Z

When we set or clear bits in a bitmap page, also set a flag in the page->private pointer. This allows us to skip writes of unchanged pages. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Use the standard bool, true, and false keywords

2011-03-10T10:36:24Z

Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Get rid of unnecessary macros (2)

2011-03-10T10:36:15Z

The FAULT_ACTIVE macro just wraps the drbd_insert_fault macro for no apparent reason. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Removed 20 seconds upper bound for side-stepping

2011-03-10T10:35:09Z

Given low-enough network bandwidth combined with a IO pattern that hammers onto a single RS-extent, side-stepping might be necessary for much longer times. Changed the code to print a single informal message after 20 seconds, but it keeps on stepping aside forever. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg

drbd: Implemented side-stepping in drbd_res_begin_io()

2011-03-10T10:34:56Z

Before: drbd_rs_begin_io() locked app-IO out of an RS extent, and waited then until all previous app-IO in that area finished. (But not only until the disk-IO was finished but until the barrier/epoch ack came in for that == round trip time latency ++) After: As soon as a new app-IO waits wants to start new IO on that RS extent, drbd_rs_begin_io() steps aside (clearing the BME_NO_WRITES flag again). It retries after 100ms. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg