https://github.com/torvalds/linux
Revision 0d200aefd4ac51787b6b80de1bb7ce93bccd59f6 authored by Joe Thornber on 03 July 2012, 11:55:31 UTC, committed by Alasdair G Kergon on 03 July 2012, 11:55:31 UTC
Userland sometimes sees a corrupt metadata block if metadata is changing
rapidly when a metadata snapshot is reserved for userland, To make the
problem go away, commit before we take the metadata snapshot (which is a
sensible thing to do anyway).
The checksums mean userland spots this corruption immediately so there's
no risk of acting on incorrect data. No corruption exists from the
kernel's point of view, and thin_check passes after pool shutdown.
I believe this is to do with shared blocks at the first level of the
{device, mapping} btree. Prior to the metadata-snap support no sharing
at this level was possible, so this patch is only required after commit
cc8394d86f045b86ff303d3c9e4ce47d97148951 ("dm thin: provide userspace
access to pool metadata").
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
1 parent 6887a41
Tip revision: 0d200aefd4ac51787b6b80de1bb7ce93bccd59f6 authored by Joe Thornber on 03 July 2012, 11:55:31 UTC
dm thin: commit metadata before creating metadata snapshot
dm thin: commit metadata before creating metadata snapshot
Tip revision: 0d200ae
tlv320aic32x4.h
/*
* tlv320aic32x4.h -- TLV320AIC32X4 Soc Audio driver platform data
*
* Copyright 2011 Vista Silicon S.L.
*
* Author: Javier Martin <javier.martin@vista-silicon.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _AIC32X4_PDATA_H
#define _AIC32X4_PDATA_H
#define AIC32X4_PWR_MICBIAS_2075_LDOIN 0x00000001
#define AIC32X4_PWR_AVDD_DVDD_WEAK_DISABLE 0x00000002
#define AIC32X4_PWR_AIC32X4_LDO_ENABLE 0x00000004
#define AIC32X4_PWR_CMMODE_LDOIN_RANGE_18_36 0x00000008
#define AIC32X4_PWR_CMMODE_HP_LDOIN_POWERED 0x00000010
#define AIC32X4_MICPGA_ROUTE_LMIC_IN2R_10K 0x00000001
#define AIC32X4_MICPGA_ROUTE_RMIC_IN1L_10K 0x00000002
struct aic32x4_pdata {
u32 power_cfg;
u32 micpga_routing;
bool swapdacs;
};
#endif
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