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>
1 parent df35c7c
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-- | 1.1 KB |
| Makefile | -rw-r--r-- | 248 bytes |
| alloc.c | -rw-r--r-- | 22.9 KB |
| alloc.h | -rw-r--r-- | 3.9 KB |
| bmap.c | -rw-r--r-- | 14.4 KB |
| bmap.h | -rw-r--r-- | 8.2 KB |
| btnode.c | -rw-r--r-- | 7.7 KB |
| btnode.h | -rw-r--r-- | 2.0 KB |
| btree.c | -rw-r--r-- | 60.0 KB |
| btree.h | -rw-r--r-- | 2.7 KB |
| cpfile.c | -rw-r--r-- | 24.8 KB |
| cpfile.h | -rw-r--r-- | 1.7 KB |
| dat.c | -rw-r--r-- | 13.5 KB |
| dat.h | -rw-r--r-- | 2.3 KB |
| dir.c | -rw-r--r-- | 17.2 KB |
| direct.c | -rw-r--r-- | 8.9 KB |
| direct.h | -rw-r--r-- | 1.5 KB |
| export.h | -rw-r--r-- | 482 bytes |
| file.c | -rw-r--r-- | 4.6 KB |
| gcinode.c | -rw-r--r-- | 5.6 KB |
| ifile.c | -rw-r--r-- | 5.9 KB |
| ifile.h | -rw-r--r-- | 1.9 KB |
| inode.c | -rw-r--r-- | 29.4 KB |
| ioctl.c | -rw-r--r-- | 36.5 KB |
| mdt.c | -rw-r--r-- | 14.7 KB |
| mdt.h | -rw-r--r-- | 4.0 KB |
| namei.c | -rw-r--r-- | 13.0 KB |
| nilfs.h | -rw-r--r-- | 12.0 KB |
| page.c | -rw-r--r-- | 14.6 KB |
| page.h | -rw-r--r-- | 2.7 KB |
| recovery.c | -rw-r--r-- | 24.4 KB |
| segbuf.c | -rw-r--r-- | 13.8 KB |
| segbuf.h | -rw-r--r-- | 6.2 KB |
| segment.c | -rw-r--r-- | 71.5 KB |
| segment.h | -rw-r--r-- | 8.1 KB |
| sufile.c | -rw-r--r-- | 32.2 KB |
| sufile.h | -rw-r--r-- | 4.9 KB |
| super.c | -rw-r--r-- | 36.0 KB |
| sysfs.c | -rw-r--r-- | 31.6 KB |
| sysfs.h | -rw-r--r-- | 5.7 KB |
| the_nilfs.c | -rw-r--r-- | 21.2 KB |
| the_nilfs.h | -rw-r--r-- | 11.5 KB |
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