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| author | Hans Holmberg <hans.holmberg@cnexlabs.com> | 2018-10-09 14:11:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-24 10:20:50 +0300 |
| commit | 1e9796622bc73a8b917ca12111534df747fe0e9d (patch) | |
| tree | 1e710b90bf8b0a04499cfd9a5d1049b871b43caa /drivers/lightnvm/pblk-sysfs.c | |
| parent | d56fe8f59a236845ed3c90deba063780282ec2ba (diff) | |
| download | linux-1e9796622bc73a8b917ca12111534df747fe0e9d.tar.xz | |
lightnvm: pblk: fix write amplificiation calculation
[ Upstream commit 765462fa4c4d0fd3eb718f2ba14cb04c35219854 ]
When the user data counter exceeds 32 bits, the write amplification
calculation does not provide the right value. Fix this by using
div64_u64 in stead of div64.
Fixes: 76758390f83e ("lightnvm: pblk: export write amplification counters to sysfs")
Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/lightnvm/pblk-sysfs.c')
| -rw-r--r-- | drivers/lightnvm/pblk-sysfs.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c index 8d2ed510c04b..bdc86ee4c779 100644 --- a/drivers/lightnvm/pblk-sysfs.c +++ b/drivers/lightnvm/pblk-sysfs.c @@ -343,7 +343,6 @@ static ssize_t pblk_get_write_amp(u64 user, u64 gc, u64 pad, { int sz; - sz = snprintf(page, PAGE_SIZE, "user:%lld gc:%lld pad:%lld WA:", user, gc, pad); @@ -355,7 +354,7 @@ static ssize_t pblk_get_write_amp(u64 user, u64 gc, u64 pad, u32 wa_frac; wa_int = (user + gc + pad) * 100000; - wa_int = div_u64(wa_int, user); + wa_int = div64_u64(wa_int, user); wa_int = div_u64_rem(wa_int, 100000, &wa_frac); sz += snprintf(page + sz, PAGE_SIZE - sz, "%llu.%05u\n", |