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drbd: New configuration parameters for dealing with network congestion

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net {
    on_congestion {block|pull-ahead|disconnect};
    congestion-fill {sectors};
    congestion-extents {al-extents};
}

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2010-10-27 11:12:07 +02:00
parent 759fbdfba6
commit 422028b1ca
4 changed files with 26 additions and 0 deletions
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9
include/linux/drbd_limits.h
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@ -129,6 +129,7 @@
#define DRBD_AFTER_SB_2P_DEF ASB_DISCONNECT
#define DRBD_RR_CONFLICT_DEF ASB_DISCONNECT
#define DRBD_ON_NO_DATA_DEF OND_IO_ERROR
#define DRBD_ON_CONGESTION_DEF OC_BLOCK
#define DRBD_MAX_BIO_BVECS_MIN 0
#define DRBD_MAX_BIO_BVECS_MAX 128
@ -154,5 +155,13 @@
#define DRBD_C_MIN_RATE_MAX (4 << 20)
#define DRBD_C_MIN_RATE_DEF 4096
#define DRBD_CONG_FILL_MIN 0
#define DRBD_CONG_FILL_MAX (10<<21) /* 10GByte in sectors */
#define DRBD_CONG_FILL_DEF 0
#define DRBD_CONG_EXTENTS_MIN DRBD_AL_EXTENTS_MIN
#define DRBD_CONG_EXTENTS_MAX DRBD_AL_EXTENTS_MAX
#define DRBD_CONG_EXTENTS_DEF DRBD_AL_EXTENTS_DEF
#undef RANGE
#endif