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05 April 2024, 19:05:47 UTC
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 
blk-mq: scale depth and rq map appropriate if low on memory
 
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
History
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
Tip revision: a516440
File Mode Size
Kconfig -rw-r--r-- 1.3 KB
Makefile -rw-r--r-- 335 bytes
acl.c -rw-r--r-- 8.9 KB
acl.h -rw-r--r-- 1.7 KB
cache.c -rw-r--r-- 10.3 KB
cache.h -rw-r--r-- 4.4 KB
fid.c -rw-r--r-- 7.2 KB
fid.h -rw-r--r-- 1.0 KB
v9fs.c -rw-r--r-- 14.8 KB
v9fs.h -rw-r--r-- 7.4 KB
v9fs_vfs.h -rw-r--r-- 3.8 KB
vfs_addr.c -rw-r--r-- 8.4 KB
vfs_dentry.c -rw-r--r-- 3.1 KB
vfs_dir.c -rw-r--r-- 5.5 KB
vfs_file.c -rw-r--r-- 21.3 KB
vfs_inode.c -rw-r--r-- 34.6 KB
vfs_inode_dotl.c -rw-r--r-- 25.1 KB
vfs_super.c -rw-r--r-- 8.7 KB
xattr.c -rw-r--r-- 4.5 KB
xattr.h -rw-r--r-- 1.4 KB
xattr_security.c -rw-r--r-- 2.1 KB
xattr_trusted.c -rw-r--r-- 2.1 KB
xattr_user.c -rw-r--r-- 2.0 KB
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