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lib/ftl: Fix padding size calculation

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Padding size calculation should take into account
already acquired write buffer entries in case
number of blocks left for closing band is less than
write buffer size.

Change-Id: I0f9c9bc94eb5a4736eede30ec424c81103e1256f
Signed-off-by: Wojciech Malikowski <wojciech.malikowski@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/463525
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Wojciech Malikowski 2019-07-29 11:32:12 -04:00 committed by Jim Harris
parent 7a260a5e99
commit b08337c216
1 changed files with 3 additions and 1 deletions
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4
lib/ftl/ftl_core.c
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@ -775,8 +775,10 @@ ftl_wptr_pad_band(struct ftl_wptr *wptr)
size_t blocks_left, rwb_size, pad_size;
blocks_left = ftl_wptr_user_lbks_left(wptr);
assert(size <= blocks_left);
assert(blocks_left % dev->xfer_size == 0);
rwb_size = ftl_rwb_size(dev->rwb) - size;
pad_size = spdk_min(blocks_left, rwb_size);
pad_size = spdk_min(blocks_left - size, rwb_size);
/* Pad write buffer until band is full */
ftl_rwb_pad(dev, pad_size);