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Jason Lunz af84eab208 [PATCH] uml: fix LVM crash ... Permit lvm to create logical volumes without crashing UML. When device-mapper's DM_DEV_CREATE_CMD ioctl is called to create a new device, dev_create()->dm_create()->alloc_dev()-> blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY) is called. blk_queue_bounce_limit(BLK_BOUNCE_ANY) calls init_emergency_isa_pool() if blk_max_pfn < blk_max_low_pfn. This is the case on UML, but init_emergency_isa_pool() hits BUG_ON(!isa_page_pool) because there doesn't seem to be a dma zone on UML for mempool_create() to allocate from. Most architectures seem to have max_low_pfn == max_pfn, but UML doesn't because of the uml_reserved chunk it keeps for itself. From what I can see, max_pfn and max_low_pfn don't get much use after the bootmem-allocator stops being used anyway, except that they initialize the block layer's blk_max_low_pfn/blk_max_pfn. This ensures init_emergency_isa_pool() doesn't crash uml in this situation by setting max_low_pfn == max_pfn in mem_init(). Signed-off-by: Jason Lunz <lunz@falooley.org> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Alasdair G Kergon <agk@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		18 years ago
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skas	[PATCH] uml: remove code controlled by non-existent config option	18 years ago
tt	…
Makefile	…
asm-offsets.c	…
config.c.in	…
dyn.lds.S	…
exec.c	…
exitcode.c	…
gmon_syms.c	…
gprof_syms.c	…
init_task.c	…
initrd.c	…
irq.c	[PATCH] uml: activate_fd: return ENOMEM only when appropriate	18 years ago
ksyms.c	…
mem.c	[PATCH] uml: fix LVM crash	18 years ago
physmem.c	…
process.c	…
ptrace.c	[PATCH] uml: x86_64 ptrace fixes	18 years ago
reboot.c	…
sigio.c	[PATCH] uml: SIGIO formatting fixes	18 years ago
signal.c	[PATCH] uml: fix formatting violations in signal delivery code	18 years ago
smp.c	…
syscall.c	…
sysrq.c	…
time.c	…
tlb.c	…
trap.c	…
uaccess.c	…
um_arch.c	[PATCH] Dynamic kernel command-line: fixups	18 years ago
umid.c	[PATCH] uml: umid tidying	18 years ago
uml.lds.S	…
vmlinux.lds.S	…