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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-09-13 11:28:14 (GMT) |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-10-14 10:10:21 (GMT) |
| commit | e8823bd63d50bb1f9bd73f1197230e1f7217456a (patch) | |
| tree | 3b8b849512686aebda99f83d290c9e09ed983967 /kernel/.gitignore | |
| parent | 6986646ba752fef150286926aa922ef04e9d19dd (diff) | |
| download | linux-fsl-qoriq-e8823bd63d50bb1f9bd73f1197230e1f7217456a.tar.xz | |
UBI: fix atomic LEB change problems
When the UBI device is nearly full, i.e. all LEBs are mapped, we have
only one spare LEB left - the one we reserved for WL purposes. Well,
I do not count the LEBs which were reserved for bad PEB handling -
suppose NOR flash for simplicity. If an "atomic LEB change operation"
is run, and the WL unit is moving a LEB, we have no spare LEBs to
finish the operation and fail, which is not good. Moreover, if there
are 2 or more simultanious "atomic LEB change" requests, only one of
them has chances to succeed, the other will fail with -ENOSPC. Not
good either.
This patch does 2 things:
1. Reserves one PEB for the "atomic LEB change" operation.
2. Serealize the operations so that only on of them may run
at a time (by means of a mutex).
Pointed-to-by: Brijesh Singh <brijesh.s.singh@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'kernel/.gitignore')
0 files changed, 0 insertions, 0 deletions