https://github.com/torvalds/linux
Revision a516440542afcb9647f88d12c35640baf02d07ea authored by Jens Axboe on 10 September 2014, 15:02:03 UTC, committed by Jens Axboe on 10 September 2014, 15:02:03 UTC
If we are running in a kdump environment, resources are scarce. For some SCSI setups with a huge set of shared tags, we run out of memory allocating what the drivers is asking for. So implement a scale back logic to reduce the tag depth for those cases, allowing the driver to successfully load. We should extend this to detect low memory situations, and implement a sane fallback for those (1 queue, 64 tags, or something like that). Tested-by: Robert Elliott <elliott@hp.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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Tip revision: a516440542afcb9647f88d12c35640baf02d07ea authored by Jens Axboe on 10 September 2014, 15:02:03 UTC
blk-mq: scale depth and rq map appropriate if low on memory
blk-mq: scale depth and rq map appropriate if low on memory
Tip revision: a516440
| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 476 bytes |
| Makefile | -rw-r--r-- | 343 bytes |
| ast.c | -rw-r--r-- | 8.0 KB |
| ast.h | -rw-r--r-- | 1.3 KB |
| config.c | -rw-r--r-- | 26.7 KB |
| config.h | -rw-r--r-- | 1.5 KB |
| debug_fs.c | -rw-r--r-- | 18.1 KB |
| dir.c | -rw-r--r-- | 7.4 KB |
| dir.h | -rw-r--r-- | 1.0 KB |
| dlm_internal.h | -rw-r--r-- | 20.0 KB |
| lock.c | -rw-r--r-- | 155.9 KB |
| lock.h | -rw-r--r-- | 2.9 KB |
| lockspace.c | -rw-r--r-- | 20.3 KB |
| lockspace.h | -rw-r--r-- | 1.0 KB |
| lowcomms.c | -rw-r--r-- | 44.6 KB |
| lowcomms.h | -rw-r--r-- | 1.1 KB |
| lvb_table.h | -rw-r--r-- | 687 bytes |
| main.c | -rw-r--r-- | 2.0 KB |
| member.c | -rw-r--r-- | 16.2 KB |
| member.h | -rw-r--r-- | 1.4 KB |
| memory.c | -rw-r--r-- | 2.1 KB |
| memory.h | -rw-r--r-- | 1.0 KB |
| midcomms.c | -rw-r--r-- | 3.7 KB |
| midcomms.h | -rw-r--r-- | 864 bytes |
| netlink.c | -rw-r--r-- | 2.9 KB |
| plock.c | -rw-r--r-- | 11.7 KB |
| rcom.c | -rw-r--r-- | 15.9 KB |
| rcom.h | -rw-r--r-- | 1.2 KB |
| recover.c | -rw-r--r-- | 22.8 KB |
| recover.h | -rw-r--r-- | 1.5 KB |
| recoverd.c | -rw-r--r-- | 7.9 KB |
| recoverd.h | -rw-r--r-- | 927 bytes |
| requestqueue.c | -rw-r--r-- | 4.8 KB |
| requestqueue.h | -rw-r--r-- | 882 bytes |
| user.c | -rw-r--r-- | 24.2 KB |
| user.h | -rw-r--r-- | 586 bytes |
| util.c | -rw-r--r-- | 4.5 KB |
| util.h | -rw-r--r-- | 805 bytes |
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