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-- | 5.7 KB |
| LICENCE | -rw-r--r-- | 1.4 KB |
| Makefile | -rw-r--r-- | 751 bytes |
| README.Locking | -rw-r--r-- | 7.0 KB |
| TODO | -rw-r--r-- | 1.9 KB |
| acl.c | -rw-r--r-- | 6.8 KB |
| acl.h | -rw-r--r-- | 929 bytes |
| background.c | -rw-r--r-- | 4.3 KB |
| build.c | -rw-r--r-- | 10.9 KB |
| compr.c | -rw-r--r-- | 11.6 KB |
| compr.h | -rw-r--r-- | 3.1 KB |
| compr_lzo.c | -rw-r--r-- | 2.2 KB |
| compr_rtime.c | -rw-r--r-- | 2.8 KB |
| compr_rubin.c | -rw-r--r-- | 8.8 KB |
| compr_zlib.c | -rw-r--r-- | 5.5 KB |
| debug.c | -rw-r--r-- | 25.7 KB |
| debug.h | -rw-r--r-- | 7.9 KB |
| dir.c | -rw-r--r-- | 22.4 KB |
| erase.c | -rw-r--r-- | 14.2 KB |
| file.c | -rw-r--r-- | 9.4 KB |
| fs.c | -rw-r--r-- | 20.0 KB |
| gc.c | -rw-r--r-- | 42.9 KB |
| ioctl.c | -rw-r--r-- | 557 bytes |
| jffs2_fs_i.h | -rw-r--r-- | 1.6 KB |
| jffs2_fs_sb.h | -rw-r--r-- | 5.8 KB |
| malloc.c | -rw-r--r-- | 7.5 KB |
| nodelist.c | -rw-r--r-- | 21.3 KB |
| nodelist.h | -rw-r--r-- | 17.8 KB |
| nodemgmt.c | -rw-r--r-- | 28.4 KB |
| os-linux.h | -rw-r--r-- | 7.3 KB |
| read.c | -rw-r--r-- | 6.7 KB |
| readinode.c | -rw-r--r-- | 43.2 KB |
| scan.c | -rw-r--r-- | 35.1 KB |
| security.c | -rw-r--r-- | 2.3 KB |
| summary.c | -rw-r--r-- | 23.6 KB |
| summary.h | -rw-r--r-- | 6.3 KB |
| super.c | -rw-r--r-- | 10.3 KB |
| symlink.c | -rw-r--r-- | 1.8 KB |
| wbuf.c | -rw-r--r-- | 37.4 KB |
| write.c | -rw-r--r-- | 21.0 KB |
| writev.c | -rw-r--r-- | 1.1 KB |
| xattr.c | -rw-r--r-- | 38.2 KB |
| xattr.h | -rw-r--r-- | 4.3 KB |
| xattr_trusted.c | -rw-r--r-- | 1.4 KB |
| xattr_user.c | -rw-r--r-- | 1.4 KB |
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