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Revision 2c8fc867602e385fd2abe76da0b6bda8ed907547 authored by Borislav Petkov on 03 October 2011, 18:28:18 UTC, committed by David S. Miller on 03 October 2011, 18:28:18 UTC 
ide-disk: Fix request requeuing
 
Simon Kirby reported that on his RAID setup with idedisk underneath
the box OOMs after a couple of days of runtime. Running with
CONFIG_DEBUG_KMEMLEAK pointed to idedisk_prep_fn() which unconditionally
allocates an ide_cmd struct. However, ide_requeue_and_plug() can be
called more than once per request, either from the request issue or the
IRQ handler path and do blk_peek_request() ends up in idedisk_prep_fn()
repeatedly, allocating a struct ide_cmd everytime and "forgetting" the
previous pointer.

Make sure the code reuses the old allocated chunk.

Reported-and-tested-by: Simon Kirby <sim@hostway.ca>
Cc: <stable@kernel.org> [ 39.x, 3.0.x ]
Link: http://marc.info/?l=linux-kernel&m=131667641517919
Link: http://lkml.kernel.org/r/20110922072643.GA27232@hostway.ca
Signed-off-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 9b13776
Raw File
svghelper.h 
#ifndef __PERF_SVGHELPER_H
#define __PERF_SVGHELPER_H

#include "types.h"

extern void open_svg(const char *filename, int cpus, int rows, u64 start, u64 end);
extern void svg_box(int Yslot, u64 start, u64 end, const char *type);
extern void svg_sample(int Yslot, int cpu, u64 start, u64 end);
extern void svg_waiting(int Yslot, u64 start, u64 end);
extern void svg_cpu_box(int cpu, u64 max_frequency, u64 turbo_frequency);


extern void svg_process(int cpu, u64 start, u64 end, const char *type, const char *name);
extern void svg_cstate(int cpu, u64 start, u64 end, int type);
extern void svg_pstate(int cpu, u64 start, u64 end, u64 freq);


extern void svg_time_grid(void);
extern void svg_legenda(void);
extern void svg_wakeline(u64 start, int row1, int row2);
extern void svg_partial_wakeline(u64 start, int row1, char *desc1, int row2, char *desc2);
extern void svg_interrupt(u64 start, int row);
extern void svg_text(int Yslot, u64 start, const char *text);
extern void svg_close(void);

extern int svg_page_width;

#endif /* __PERF_SVGHELPER_H */
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